During takeoff , it is destroyed by alien air forces , killing Grayston , Guerrero , Lenihan and Simmons .
A helicopter soon arrives to evacuate the wounded Marines , but fails to take civilians because of weight restrictions .
During takeoff , Marines is destroyed by alien air forces , killing Grayston , Guerrero , Lenihan and Simmons .
A helicopter soon arrives to evacuate the wounded Marines , but fails to take civilians because of weight restrictions .