FILE - In this Saturday, Nov. 23, 1963 file photo, the flag-draped casket of President John F. Kennedy lies in state in the East Room of the White House in Washington. "Jackie Kennedy sent word that she wanted the East Room, where the president would lie in state, to look as it did when Lincoln's body lay there," remembers Richard Goodwin, a speechwriter and adviser to the administration. He and others went to work. Someone was sent to the Library of Congress for a sketch and a newspaper description from Lincoln's time; artists and upholsterers were called in, and black crepe was carefully hung. "In the midst of all these activities we would alternately break down in tears," Goodwin says.
File-In the is Nov. 22, 1963 file photo, Lyndon B. Johnson is sworn in as President of the United States of America as Jacqueline Kennedy stands at his side in the cabin of the presidential plane on the ground in Dallas. Judge Sarah T. Hughes, a Kennedy appointee to the Federal court, left, administers the oath. In background, from left are, Jack Valenti, administrative assistant to Johnson; Rep. Albert Thomas, D-Texas.; Lady Bird Johnson; and Rep. Jack Brooks, D-Texas.
FILE - In a Nov. 24, 1963, file photo President John F. Kennedy assassin Lee Harvey Oswald, center in handcuffs, is shot by Jack Ruby, foreground, in the underground garage of the Dallas police headquarters. Oswald died at Parkland Hospital several hours later. His body was buried and then exhumed in 1981 to put to rest theories that Oswald's body wasn't actually there.
President Barack Obama, first lady Michelle Obama, former President Bill Clinton and his wife former Secretary of State Hillary Rodham Clinton, along with members of the Kennedy family, pause during a wreath laying ceremony in honor of President John F. Kennedy, Wednesday, Nov. 20, 2013, at Arlington National Cemetery in Arlington, Va. Friday will mark the 50th anniversary of the Kennedy assassination.
FILE - In this Sunday, Nov. 24, 1963 file photo, a horse-drawn caisson bearing the body of President John F Kennedy heads from the White House, background, to the Capitol for him to lie in state.
FILE - In this Sunday, Nov. 24, 1963 file photo, the casket of President John F. Kennedy reaches the Capitol in Washington on a horse-drawn caisson, accompanied by a symbolic riderless horse named Black Jack, with boots reversed in the stirrups, symbolizing a fallen leader.
In this image made available by Tony Zappone, President John F. Kennedy shakes hands of spectators in Tampa, Fla. on Nov. 18, 1963. President Kennedy was in Tampa to give a speech commemorating the 50th anniversary of the first scheduled passenger airplane flight. A film and photo exhibit at the Tampa Bay History Center, documents those few hours he spent in Tampa.
This image released by the National Geographic Channel shows Rob Lowe, left, as President John F. Kennedy and Ginnifer Goodwin, right, as Jackie Kennedy having a family picnic on the White House Lawn during the filming of "Killing Kennedy." A wide range of actors have played President John F. Kennedy in the movies and on TV.
In this photo made Thursday, Nov. 7, 2013, a plaque tell the history of the death of President John F. Kennedy on Nov. 22, 1963, at Parkland Memorial Hospital in Dallas.
FILE - In this October 1962 file photo provided by the White House, President John F. Kennedy, left, claps time as his children Caroline, center, and John, Jr. dance in the Oval Office. Asked in 2012 if she ever felt overwhelmed by the legacy of the Kennedy years and the carefully cultivated image of a modern day Camelot, Kennedy said, "I can't imagine having better parents and a more wonderful brother. So I feel really fortunate that those are my family, and I wish they were here.
FILE - In this Nov. 22, 1963 file photo, President John F. Kennedy and his wife, Jacqueline Kennedy, arrive at Love Field airport in Dallas, as a television camera, above, follows them. More than a dozen new documentary and information specials are among the crop of TV commemorations pegged to this half-century mark of a weekend when, as viewers will be reminded again and again, everything changed.
This image of a Texas Department of State Health Services document provided by Ancestry.com on Nov. 14, 2013 shows the death certificate of President John F. Kennedy who died on Friday, Nov. 22, 1963.
This photo provided by Bill Kunkel shows Kunkel (third from left) standing with Sen. John F. Kennedy in April, 1960 as JFK campaigned in Portland, Ore. Kunkel, then a Democratic Party volunteer, spent that day driving Kennedy around Portland.
FILE - In this Nov. 22, 1963 file photo, President John F. Kennedy and first lady Jacqueline Kennedy greet people on their arrival at the Dallas Airport (Love Field).
FILE - In this Nov. 22, 1963 file photo, President John F. Kennedy's motorcade travels through Dallas.
A small new exhibit at the John F. Kennedy Library and Museum marking the 50th anniversary of the assassination of the 35th President of the United States includes never-before-displayed artifacts from his three-day state funeral, such as the American flag which draped the president's casket presented with a photograph of first lady Jacqueline Bouvier Kennedy during her husband's funeral in Boston, Thursday, Nov. 14, 2013.
FILE - In this Nov. 13, 1963 file photo, U.S. President John F. Kennedy and first lady Jacqueline Kennedy sit with their children, John Jr. and Caroline, on a portico overlooking the White House South Lawn in Washington. In background is British Ambassador David Ormsby Gore.
FILE - In this Monday, Nov. 25, 1963 file photo, 3-year-old John F. Kennedy Jr. salutes his father's casket in Washington, three days after the president was assassinated in Dallas. Widow Jacqueline Kennedy, center, and daughter Caroline Kennedy are accompanied by the late president's brothers Sen. Edward Kennedy, left, and Attorney General Robert Kennedy.
Flowers are left at the National Historic Landmark marker in Dealey Plaza, on Thursday Nov. 21, 2013 in Dallas. Nov. 22, 2013 will be the 50th anniversary of the assassination of President John F. Kennedy.