CHALLENGER-CLASS USS Armstrong NCC-57537 Ambushed by a Klingon battle group in 2373 and took heavy damage; docked at DS9 formedical aid. Named for Neil Armstrong, the first human to walk on Earth's moon. "Apocalypse Rising" -DS9 USS Buran NCC-57580 Destroyed by the Borg at Wolf 359 in 2367. Named for the Russian space shuttle, which also means "snowstorm." "Best of Both Worlds, part II" - TNG USS Challenger NCC-2032 Prototype. Would have participated in Operation Retrieve. Named in honor of the space shuttle Challenger that was destroyed in 1986 killing all of it'screw. "Star Trek VI: The Undiscovered Country" USS Kearsarge NCC-57566 Scheduled to rendezvous with the Enterprise-D in 2370, however postponed. Named for the American aircraft carrier that recovered the Freedom Seven space craft. "Firstborn" - TNG