Around the same time, he achieved still more fame when he joined civil rights activists like his friend the actor Charlton Heston, as well as Dr. Martin Luther King Jr., in marches demanding equal rights for African Americans. Ironically, while he was fighting for the rights of some, he was suspected of infringing on those of others. His detractors alleged that through the fifties and early sixties, at air force bases in Texas and Oklahoma, he performed experiments on unwitting subjects using LSD and hypnosis.
