Canadian Forces Cpl. Brandi Rink, center, a medical

Canadian Forces Cpl. Brandi Rink, center, a medical assistant with the 33rd Field Ambulance, administers an intravenous injection to a simulated casualty with assistance from U.S. Army Lt. Col. William Thompson, right, during exercise Southbound Trooper at Fort Pickett, Va., Feb. 22, 2013. Thompson, the commander of the 7236th Medical Support Unit, provided instruction to participants during the joint exercise focused on honing medical techniques, skills and procedures. (U.S. Army photo by Staff Sgt. Marnie Jacobowitz/Released)