04/12/10...10:41 PM...STS-131 EVA-3 begins STS-1 First Shuttle Flight: April 12, 1981 http://www.youtube.com/watch?v=Aa5OxN6kSsA NASA TV's This Week @NASA, April 9 "NASA ANNIVERSARY: April 12, 1981, STS-1 -- First Shuttle Launch Twenty-nin…