article_snippet: the helicopter was first reported missing at about 8:30 p.m. (9:30 p.m. ET) Tuesday.
article_snippet: The UH-60 helicopter wasn't alone when The UH-60 helicopter went down.
article_snippet: A second Black Hawk -- assigned to 1-244th Assault Helicopter Battalion based in Hammond, Louisiana -- safely returned to the base, some 40 miles east of Pensacola.
article_snippet: Whatever the trouble was with the aircraft, the trouble did not involve the second helicopter that was participating in the exercise," Bourland said.
article_snippet: a crash about 70 miles east of Naval Air Station Fallon in western Nevada involved a UH-60 Black Hawk, a twin-engine helicopter introduced into Army service in 1979 in place of the iconic UH-1 Huey.
article_snippet: Other branches have modified the Black Hawk for Other branches own uses, including the Navy's SH-60 (the Sea Hawk), the Air Force's MH-60 (the Pave Hawk) and the Coast Guard's HH-60 (the Jayhawk).
article_snippet: The Army's UH-60 helicopter, which has a maximum speed of 173 mph, has an airframe "designed to progressively crush on impact to protect the crew and passengers," according to the service.
highlights_snippet: Four air crew members, seven Marines were on board the helicopter .
  
highlights_snippet: Four air crew members have not been identified .