Hunger striker Gino Casanova has ended a 51-day fast he endured to draw attention to soldiers missing in action and rumors of U.S. prisoners held in Vietnam, a friend said. Casanova, a veteran, refused a medical exam and has flown home from Washington to Washington state, the friend said. Casanova's hunger strike lasted as long as his 1985 fast in Kent, Wash., also over the MIA issue. He staged the second fast in a cage near the Vietnam Veterans Memorial. His friend said Casanova ended the fast after receiving calls from dignitaries and people concerned about missing servicemen in Vietnam.