Though barely two months have elapsed since the successful flight of Apollo 9, the U.S. is poised for yet another space epic. At Cape Kennedy last week, a giant Saturn 5 stood on Pad 39B, and an astronaut crew and NASA technicians methodically ran through a mock countdown in preparation for the launch of Apollo 10 on May 18.
The forthcoming eight-day mission is a dress rehearsal for July's lunar landing attempt. It is easily the most complex and ambitious flight yet scheduled for the U.S. manned space program. Astronauts Thomas Stafford,...
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