U.S. Army Command Sgt. Maj. Michael A. Grinston, center, climbs aboard a mine-resistant, ambush-protected vehicle during vehicle training on Al Asad Air Base, Iraq, Feb. 11, 2015. Grinston is the senior enlisted advisor to the Combined Joint Forces Land Component Command - Iraq. U.S. Army Command Sgt. Maj. Michael A. Grinston, center, climbs aboard a mine-resistant, ambush-protected vehicle during vehicle training on Al Asad Air Base, Iraq, Feb. 11, 2015. Grinston is the senior enlisted advisor to the Combined Joint Forces Land Component Command - Iraq. SHARE: Download: Full Size (1.87 MB) Tags: Photo Essays Credit: VIRIN: 964594-Z-MKL83-197.jpg Photo Gallery