LOS ANGELES, Sept. 9 (UPI) -- Mark Hamill says he had suppressed memories resurface as he prepared to play The Major in The Long Walk , in theaters Friday. The villainous character leads a race in which 50 young men walk until only one remains alive. The Major rides in his military jeep to supervise the Long Walk, an annual contest in a dystopian United States. Contestants who slow down or stop are given three warnings before they are shot and killed by the Major's troops. Based on the Stephen