The Mercury-Atlas 5 reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)
Mercury-Atlas 5 was an un-manned spaceflight of the mercury program. It was launched on November 29, 1961 with Enos the chimp aboard. The craft orbited the Earth twice and splashed-down off the coast of Puerto Rico. Enos was unharmed.