Staff Sgt. Angel Alexander holds a piece of plywood as Airman 1st Class Kristian Martinez-Felix cuts the plywood for the 31st Air Defense Artillery Brigade’s Tactical Operations Center at Al Udeid Air Base, Qatar, Feb. 24, 2014. The 577th Prime BEEF was tasked to construct a TOC to provide a robust and clear audio and visual common operating picture spanning over five nations in the Arabian Gulf region and to meet the security requirements of the 31st ADA Brigade. Both Airmen are 577th EPBS heating, ventilation, and air conditioning technicians. Alexander is deployed from Kadena Air Base, Japan and a Philadelphia, native. Martinez-Felix is deployed from Grand Forks Air Force Base, N.D., and a Phoenix, native. (U.S. Air Force photo/Senior Airman Hannah Landeros)