Exercise Polar Force 11-10

A 3rd Wing F-22 Raptor prepares to land during Exercise Polar Force 11-10 at Joint Base Elmendorf-Richardson, Alaska, Nov. 16, 2011. The exercise is made up of a variety of scenarios which test the arctic warriors' ability to handle real world situations. (U.S. Air Force photo/Staff Sgt. Sheila deVera)

212th Rescue Squadron and 509th Infantry Regiment (Airborne) Train with Each Other

An HH-60G Pavehawk helicopter transports the casualties and members of Baker Company, 3rd Battalion (Airborne), 509th Infantry Regiment and the 212th Rescue Squadron pararescuemen during training on Joint Base Elmendorf-Richardson September 21, 2011. In this specific training scenario, the pararescuemen used the helicopter to evacuate members of Baker Company who were hit by an improvised explosive device. (U.S. Air Force photo/Staff Sgt. Zachary Wolf)

Raptors Return to Flight

An F-22 Raptor takes off from Joint Base Elmendorf-Richardson, Alaska, Sept. 21, after a four-month stand down. Secretary of the Air Force Michael Donley and Chief of Staff Gen. Norton Swartz recently approved an implementation plan developed by Air Combat Command officials that will allow the F-22 to resume flight operations. The commander of Air Combat Command directed a stand-down of the fleet May 3 as a safety precaution, following 12 separate reported incidents where pilots experienced hypoxia-like symptoms. (U.S. Air Force photo/Steven White)

Raptors Return to Flight

An F-22 Raptor takes off from Joint Base Elmendorf-Richardson, Alaska, Sept. 21, after a four month stand-down. Secretary of the Air Force Michael Donley and Chief of Staff Gen. Norton Schwartz recently approved an implementation plan developed by Air Combat Command officials that will allow the F-22 to resume flight operations. The commander of ACC directed a stand-down of the fleet May 3 as a safety precaution, following 12 separate reported incidents where pilots experienced hypoxia-like symptoms. (US Air Force photo/Senior Airman Cynthia Spalding)

Raptors Return to Flight

An F-22 Raptor flies over Joint Base Elmendorf-Richardson, Alaska, Sept. 21, after a four month stand-down. Secretary of the Air Force Michael Donley and Chief of Staff Gen. Norton Schwartz recently approved an implementation plan developed by Air Combat Command officials that will allow the F-22 to resume flight operations. The commander of ACC directed a stand-down of the fleet May 3 as a safety precaution, following 12 separate reported incidents where pilots experienced hypoxia-like symptoms. (US Air Force photo/Senior Airman Cynthia Spalding)

Raptors Return to Flight

Staff Sgt. Alex Raaymakers, a crew chief, performs end of runway checks prior to an F-22 Raptor take off from Joint Base Elmendorf-Richardson, Alaska, Sept. 21, after a four month stand-down. Secretary of the Air Force Michael Donley and Chief of Staff Gen. Norton Schwartz recently approved an implementation plan developed by Air Combat Command officials that will allow the F-22 to resume flight operations. The commander of ACC directed a stand-down of the fleet May 3 as a safety precaution, following 12 separate reported incidents where pilots experienced hypoxia-like symptoms. (US Air Force photo/Senior Airman Cynthia Spalding)