(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on November 22, 1963. Americans reflected Saturday on the presidency of John F. Kennedy, who was assassinated 45 years ago, as once again a young, inspiring president is headed to the White House.(AFP/File)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on November 22, 1963. Americans reflected Saturday on the presidency of John F. Kennedy, who was assassinated 45 years ago, as once again a young, inspiring president is headed to the White House.(AFP/File)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on November 22, 1963. Americans reflected Saturday on the presidency of John F. Kennedy, who was assassinated 45 years ago, as once again a young, inspiring president is headed to the White House.(AFP/File)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on November 22, 1963. Americans reflected Saturday on the presidency of John F. Kennedy, who was assassinated 45 years ago, as once again a young, inspiring president is headed to the White House.(AFP/File)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on November 22, 1963. Americans reflected Saturday on the presidency of John F. Kennedy, who was assassinated 45 years ago, as once again a young, inspiring president is headed to the White House.(AFP/File)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on November 22, 1963. Americans reflected Saturday on the presidency of John F. Kennedy, who was assassinated 45 years ago, as once again a young, inspiring president is headed to the White House.(AFP/File)

(Reuters) - A man wears a bullet around his neck at the site of former U.S. President John F. Kennedy's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi(UNITED STATES)

(Reuters) - Tim Forsman, (C), hugs his daughters Ariana, 15, (L), and Alyssa, 11, (R), at the site of former U.S. President John F. Kennedy's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi(UNITED STATES)

(Reuters) - Gary Gossett (L) holds newspapers from 1963 as Stephen Cooper (R) embraces Shannon Walker at the site of former President John F. Kennedy's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi(UNITED STATES)

(Reuters) - A boy pauses during a moment of silence at the site of former President John F. Kennedy's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi(UNITED STATES)

(Reuters) - Michael Washington offers to sell people the opportunity to take a photo with a portrait of former U.S. President John F. Kennedy and his wife Jacqueline, on the site of the former President's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi(UNITED STATES)

(Reuters) - Bridgett Brown, of Dallas, holds a newspaper at the site of former President John F. Kennedy's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi (UNITED STATES)

(Reuters) - A woman kneels to take a picture of a plaque marking the site of former U.S. President John F. Kennedy's assassination on the 45th anniversary of his death in Dallas, Texas November 22, 2008. REUTERS/Jessica Rinaldi(UNITED STATES)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on 22 November 1963. Americans reflected on the presidency of Kennedy, who was killed 45 years ago on Saturday.(AFP/File)

(AFP/File) - Former US president John F. Kennedy and his wife Jacqueline shortly before his assassination in Dallas on 22 November 1963. Americans reflected on the presidency of Kennedy, who was killed 45 years ago on Saturday.(AFP/File)

(AP) - Jason D. Strickland, accused of beating his stepdaughter, Haleigh Poutre, so severely that she suffered permanent brain injury triggering a right-to-die case, holds papers while testifying during his trial at Hampden Superior Court in Springfield, Mass., Friday morning Nov. 21, 2008. (AP Photo/Dave Roback,pool)

(AP) - Jason D. Strickland, accused of beating his stepdaughter, Haleigh Poutre, so severely that she suffered permanent brain injury triggering a right-to-die case, shows defense attorney Alan J. Black an area on the chin where he noticed an injury to her during his trial session at Hampden Superior Court in Springfield, Mass., Friday morning Nov. 21, 2008. (AP Photo/Dave Roback,pool)

(AP) - Lee Harvey Oswald, assassin of President John F. Kennedy, reacts as Dallas night club owner Jack Ruby, foreground, shoots at him from point blank range in a corridor of Dallas police headquarters, Nov. 24, 1963. At left is Detective Jim Leavelle. Leavelle wanted to secretly take Oswald out the side door of Dallas police headquarters on that day forty-five years ago. His boss wanted to keep a promise to reporters. So Leavelle handcuffed himself to President Kennedy's assasin, stepped into a crowded basement and became an accidental part of history. (AP Photo/Dallas Times-Herald, Bob Jackson) NO SALES

(AP) - Retired Dallas Police Department Detective Jim Leavelle poses in the former book depository building, now known as The Sixth Floor Museum at Dealey Plaza, from which Lee Harvey Oswald fired the fatal shots killing President John F. Kennedy, in Dallas, Wednesday, Nov. 19, 2008. Detective Leavelle wanted to secretly take Oswald out the side door of Dallas police headquarters on Nov. 24, 1963. His boss wanted to keep a promise to reporters. So Leavelle handcuffed himself to President Kennedy's assasin, stepped into a crowded basement and became an accidental part of history. (AP Photo/Tony Gutierrez)

(AP) - Retired Dallas Police Detective Jim Leavelle recounts to an audience at The Sixth Floor Museum at Dealey Plaza, of the day Lee Harvey Oswald was killed while he was handcuffed to him, in Dallas, Wednesday, Nov. 19, 2008. Detective Jim Leavelle wanted to secretly take Lee Harvey Oswald out the side door of Dallas police headquarters on Nov. 24, 1963. His boss wanted to keep a promise to reporters. So Leavelle handcuffed himself to President Kennedy's assassin, stepped into a crowded basement and became an accidental part of history. (AP Photo/Tony Gutierrez)

(AP) - Bill Newman and his wife, Gayle, talk about the day President John F. Kennedy was shot as they stand near where they were that day in front of the Texas School Book Depository in Dallas, Tuesday, June 3, 2008. (AP Photo/Ed Reinke)

(AP) - Bill Newman points to the spot he and his wife Gayle, left, were located when President John F. Kennedy was shot Nov. 22, 1963, as they tour The Sixth Floor Museum at Dealey Plaza in Dallas, Tuesday, June 3, 2008. (AP Photo/Ed Reinke)

(AP) - This photograph taken Saturday Nov. 8, 2008 shows the house where Vincent Romero, 29, and Timothy Romans, 39, of San Carlos, Ariz were found fatally shot in St. Johns, Ariz. on Wednesday. Police say the boy planned and meticulously carried out the shootings, but they haven't discussed a motive. Child psychologists and others say that while many factors could cause a child to kill a parent, the most common in other cases has been severe abuse. Those who know the boy and his family say there was no abuse — that his father, Vincent Romero, was a good dad trying to raise his son to be a polite and respectful boy. (AP Photo/Dana Felthauser)

(AP) - Gen. Ann E. Dunwoody gives a thumbs up to recognize her father, retired Brig. General Harold H. Dunwoody, of Engelwood, Fla., not pictured, Friday, Nov. 14, 2008, during her promotion ceremony to four-star General at the Pentagon. (AP Photo/Susan Walsh)

(AP) - A photo rendered from video shows rescue workers towing a paddle boat after pulling it from out of the Fox River near Algonquin, Ill., Friday, Nov. 14, 2008, near the site where three Chicago high school students drowned while they were on a school-sponsored retreat. Authorities say they sneaked away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. In all, six paddle boats were taken out on the water and they all sank. (AP Photo/Raza Siddiqui)

(AP) - A photo rendered from video shows rescue workers pulling a paddle boat out of the Fox River near Algonquin, Ill., Friday, Nov. 14, 2008, near the site where three Chicago high school students drowned while they were on a school-sponsored retreat. Authorities say they sneaked away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. In all, six paddle boats were taken out on the water and they all sank. (AP Photo/Raza Siddiqui)

(AP) - A photo rendered from video shows a rescue worker pulling a paddle boat out of the Fox River near Algonquin, Ill., Friday, Nov. 14, 2008, near the site where three Chicago high school students drowned while they were on a school-sponsored retreat. Authorities say they sneaked away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. In all, six paddle boats were taken out on the water and they all sank. (AP Photo/Raza Siddiqui)

(AP) - A teenage boy leaves the North Lawndale Community Church with his parents when his leadership retreat was cut short after the deaths of three classmates from the North Lawndale College Prep High School in Chicago, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter.(AP Photo/Charles Rex Arbogast)

(AP) - Milton Hardnett, left, escorts his son Joseph to their car after his son returned from a shortened leadership retreat outside the North Lawndale Community Church in Chicago, Friday, Nov. 14, 2008. Three teenage boys from the North Lawndale College Prep High School on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter.(AP Photo/Charles Rex Arbogast)

(AP) - A sheriff's deputy directs a tow truck removing paddle boats from Camp Algonquin where three Chicago students drowned in a sinking paddle boat in the Fox River in Algonquin, Ill. Friday, Nov. 14, 2008. (AP Photo/David Banks)

(AP) - A teenage boy leaves the North Lawndale Community Church with a parent after his leadership retreat was cut short after the deaths of three classmates from the North Lawndale College Prep High School in Chicago, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter.(AP Photo/Charles Rex Arbogast)

(AP) - Volunteers from the North Lawndale Community Church unload baggage belonging to students from the North Lawndale College Prep High School after their leadership retreat was cut short in Chicago, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter.(AP Photo/Charles Rex Arbogast)

(AP) - Volunteers from the North Lawndale Community Church unload baggage belonging to students from the North Lawndale College Prep High School after their leadership retreat was cut short in Chicago, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter.(AP Photo/Charles Rex Arbogast)

(AP) - Volunteers from the North Lawndale Community Church unload baggage belonging students from the North Lawndale College Prep High School after their leadership retreat was cut short in Chicago, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter.(AP Photo/Charles Rex Arbogast)

(AFP/Getty Images) - General Ann Dunwoody (R), commander of the Army Materiel Command, is congratulated by U.S. Secretary of Defense Robert Gates (L) and Gen. George Casey (C), U.S. Army Chief of Staff, at the Pentagon in Arlington, Virginia. The female descendant of a long line of US military officers was promoted to four star general Thursday, the first woman ever to reach the top rung of the US military.(AFP/Getty Images/Win Mcnamee)

(AFP/Getty Images) - General Ann Dunwoody, commander of the Army Materiel Command (C), has her new shoulder boards attached by her husband, Colonel Craig Brotchie (R), USAF (Retired), and U.S. Army Chief of Staff Gen. George Casey (L) at the Pentagon in Arlington, Virginia. With her promotion, Dunwoody became the nation's first female four-star general.(AFP/Getty Images/Win Mcnamee)

(AFP/Getty Images) - General Ann Dunwoody, commander of the Army Materiel Command, looks on during her promotion ceremony to the rank of four-star general at the Pentagon in Arlington, Virginia. The female descendant of a long line of US military officers was promoted to four star general Thursday, the first woman ever to reach the top rung of the US military.(AFP/Getty Images/Win Mcnamee)

(AFP/Getty Images) - General Ann Dunwoody (R), commander of the Army Materiel Command, is congratulated by U.S. Secretary of Defense Robert Gates (L) and Gen. George Casey (C), U.S. Army Chief of Staff, at the Pentagon in Arlington, Virginia. The female descendant of a long line of US military officers was promoted to four star general Thursday, the first woman ever to reach the top rung of the US military.(AFP/Getty Images/Win Mcnamee)

(AFP/Getty Images) - General Ann Dunwoody, commander of the Army Materiel Command (C), has her new shoulder boards attached by her husband, Colonel Craig Brotchie (R), USAF (Retired), and U.S. Army Chief of Staff Gen. George Casey (L) at the Pentagon in Arlington, Virginia. With her promotion, Dunwoody became the nation's first female four-star general.(AFP/Getty Images/Win Mcnamee)

(AFP/Getty Images) - General Ann Dunwoody, commander of the Army Materiel Command, looks on during her promotion ceremony to the rank of four-star general at the Pentagon in Arlington, Virginia. The female descendant of a long line of US military officers was promoted to four star general Thursday, the first woman ever to reach the top rung of the US military.(AFP/Getty Images/Win Mcnamee)

(AP) - Unidentified students from the North Lawndale College Prep High School leave for the day on Chicago's Westside, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. (AP Photo/Charles Rex Arbogast)

(AP) - An unidentified family takes their son home from the North Lawndale College Prep High School on Chicago's Westside, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. (AP Photo/Charles Rex Arbogast)

(AP) - An unidentified student from the North Lawndale College Prep High School sits on a bus for the trip home on Chicago's Westside, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. (AP Photo/Charles Rex Arbogast)

(AP) - Terrance Williams wipes the tears from his eyes as he picks his unidentified daughter up from the North Lawndale College Prep High School on Chicago's Westside, Friday, Nov. 14, 2008. Three teenage boys from the high school on a retreat to teach young black men to become 'ethical leaders' drowned early Friday after they snuck away from their camp in the middle of the night and launched paddle boats whose floor plugs had been removed for the winter. (AP Photo/Charles Rex Arbogast)

(AP) - Gen. Ann E. Dunwoody, left, gets a hug from her husband, retired Air Force Col. Craig Brotchie during her promotion ceremony to a four-star General, Friday, Nov. 14, 2008, at the Pentagon. (AP Photo/Susan Walsh)