Staff Sgt. Otto Yan, 28th Security Forces Squadron military working dog handler, performs a weighted rope pull during the inaugural Sexual Assault Prevention Combat Challenge in the Pride Hangar at Ellsworth Air Force Base, S.D., April 24, 2014. The event consisted of team-based obstacles and was meant to raise awareness about sexual assault awareness and prevention month. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)