Private Sean Winters, a medic with Company C, 702nd

Private Sean Winters, a medic with Company C, 702nd Brigade Support Battalion, 4th Stryker Brigade Combat Team, 2nd Infantry Division treats a simulated casualty June 12 outside the company's aid station on the National Training Center at Fort Irwin, Calif., during a mass casualty exercise that tested their entire base. 4th Stryker Brigade is spending the month of June at the center making final preparations for a deployment to Afghanistan this fall.