Russia spent Tuesday celebrating its Gagarin’s space accomplishment in 1961. It was another 23 days before American Alan Shepard became the second man in space.
Associated Press writers Alicia Chang in Los Angeles; Dan Sewell in Dayton, Ohio; Seth Borenstein in Washington; Marcia Dunn in Colorado Springs, Colo.; Verena Dobnik in New York; and Will Weissert in San Antonio contributed to this report.
Kennedy Space Center: http://www.kennedyspacecenter.com/
Calif. Science Center: http://www.californiasciencecenter.org/