U.S. Army Spc. Megan Dietz, kneeling, assigned to the 1st Battlefield Coordination Detachment, and Air Force 1st Lt. Emma Sultemeier, with the 612th Air and Space Operations Center, practice ground grappling during the Modern Army Combatives Programs Basic Combatives Course Level 1 Jan. 13, 2014, at Davis-Monthan Air Force Base, Ariz.