MINOT AIR FORCE BASE, N.D. --   The 91st Missile Wing held its Global Strike Challenge kick-off party on Minot Air Force Base, N.D., Aug. 15, 2014. Global Strike Challenge events provide teams the opportunity to improve their knowledge, readiness and effectiveness through intense preparation and spirited competition. Competition categories include bomber, Intercontinental Ballistic Missile and helicopter operations, bomber and ICBM maintenance and security forces.