Yuri Gagarin the first human in space 51 years ago; first shuttle launched 31 years ago
Astronauts in orbit mark two big space anniversariesLink copiedApril 13, 2012, 12:38 PM UTCBy msnbc.com technology & scienceYuri Gagarin the first human in space 51 years ago; first shuttle launched 31 years agomsnbc.com technology & science
