Members of the 122nd Fighter Wing fire department battle a simulated aircraft fire July 22, 2015, at the Combat Readiness Training Center in Alpena, Michigan.

A UH-N1 Iroquois circles trees during a search and rescue training mission near Garrison, North Dakota, July 20, 2015.

Josh Thurman, from Spring City, Tennessee, waves the American flag from the top of his car at the memorial in front of Armed Forces Recruiting Center in Chattanooga, Tennessee. Thurman has been driving from his home to the memorial everyday to wave the flag. The memorial honors the four Marines and one Sailor who died in the shooting at Navy Operational Support Center Chattanooga on July 16.

Capt. Ross Farling, hugs his daughters during a homecoming ceremony at the Kentucky Air National Guard Base in Louisville, Kentucky, July 4, 2015.

A University of California Los Angeles Army ROTC cadet, assigned to Cadet Leadership Course Regiment 8, uses a board as a bridge on an obstacle course that focuses on critical thinking and problem solving during training at the Team Development Course at Fort Knox, Kentucky, July 11, 2015.

A rescue swimmer is lowered to the ice from a Coast Guard MH-60 Jayhawk helicopter during a search and rescue exercise in the Arctic, July 14, 2015. Conducted over two days, the search and rescue exercise involved crews from the Coast Guard Cutter Healy and a Coast Guard Jayhawk working with scientists and interagency partners to test rescue capabilities off the North Shore of Alaska.

U.S. Army Soldiers, assigned to the Michigan National Guard secure a landing zone during an infiltration/exfiltration mission, part of Exercise Northern Strike at the Joint Maneuver Training Center, Camp Grayling, Michigan, July 23, 2015.