Bob Crippen, former Kennedy center director and NASA astronaut, speaks to guests during an Astronauts Memorial Foundation tribute honoring U.S. Air Foce Maj. Robert Lawrence. Like Crippen, Lawrence was selected in the 1960s for the Manned Orbiting Laboratory Program. As such, Lawrence was the first African-American astronaut. He lost his life in a training accident 50 years ago. The ceremony took place in the Center for Space Education at the Kennedy Space Center Visitor Complex.