PBS has announced major plans to mark the 50th anniversary of President John F. Kennedy's assassination.

Public television will devote six prime-time hours to the Kennedy story in November.

The biggest program is "JFK," a new, four-hour profile from "American Experience." PBS promises "a fresh assessment of the enigmatic man, his accomplishments and his unfulfilled promise." There will be interviews with Kennedy family members. But those fresh assessments are likely to come from historians such as Robert Caro, Robert Dallek and Evan Thomas. The program debuts at 9 p.m. Nov. 11 and 12.

On Nov. 13, PBS will look at the Kennedy assassination in two programs. "Nova" will offer what is tentatively titled "Cold Case JFK" at 9. Forensic experts will use new technology to review the weapon, bullets and wounds. "Exclusive ballistics tests provide important new insights on the controversial 'single bullet theory,' " PBS said.

The second program is part of the "Secrets of the Dead" series and will premiere at 10. "JFK: One PM Central Standard Time" focuses on the CBS reporting about the president's assassination. The special examines anchor Walter Cronkite's announcement that Kennedy had died, one of the most memorable moments in the national crisis. Those interviewed include Dan Rather, Bob Schieffer, Marvin Kalb and former President Bill Clinton. George Clooney narrates the program.