NASA legends remember the nerve-wracking moments before moon landing
Fifty years ago Tuesday, Apollo 11 blasted off from Earth for its historic mission to the moon. Charlie Duke was the voice on the radio talking to the astronauts, as flight director Gene Kranz led mission control during the lunar landing. Above the moon, Michael Collins piloted the Apollo 11 command module while his fellow astronauts walked the moon's surface. Mark Strassmann spoke with all three men.