John Young, legendary moonwalker and shuttle commander, dead at 87

Legendary astronaut John Young -- who twice ventured into space in pioneering two-man Gemini capsules, orbited the moon and then walked on its cratered surface before commanding two space shuttle missions, including the program's maiden flight -- has died, ending one of the most storied careers in space history. NASA confirmed the death early Saturday on Twitter."We're saddened by the loss of astronaut John Young, who was 87," NASA tweeted. "Young flew twice to the Moon, walked on its surface &a