Derived from

HefterLocher.wav by Mortifreshman
http://freesound.org/people/Mortifreshman/sounds/246518/
http://creativecommons.org/publicdomain/zero/1.0/

missile_launch_2.wav by smcameron
http://freesound.org/people/smcameron/sounds/51468/
http://creativecommons.org/licenses/by/3.0/