The History Channel is coming under fire for a documentary it aired in November that implicates President Lyndon Johnson in the assasination of JFK. Critics of The Guilty Men — which include MPAA president Jack Valenti, LBJ's widow, Lady Bird, and former presidents Ford and Carter — are demanding that The History Channel investigate the film's accusations and air a rebuttal. "I thought it was [as] obscene as you can get," Valenti, a former special assistant to Johnson, vented to the New York Post. "It was so riddled with surmise."