9/11 ceremony at Joint Base Pearl Harbor-Hickam, Hawaii

Neil Abercrombie, Brig. Gen. Joseph Kim and Col. Sam Barrett observe a moment of silence as active-duty, Guard and Reserve Airmen gathered Sept. 9, 2011, for a 9/11 tribute ceremony at Joint Base Pearl Harbor-Hickham, Hawaii. Abercrombie is the governor of Hawaii, Kim is the Hawaii National Guard deputy adjutant general and Barrett is the 15th Wing commander. (Defense Department photo/Master Sgt. Cohen A. Young)

9/11 ceremony at Joint Base Pearl Harbor-Hickam, Hawaii

Col. Sam Barrett, Hawaii National Guard Deputy Adjutant General Brig. Gen. Joseph Kim and Gov. Neil Abercrombie watch as two honor guard members raise the flag during a 9/11 tribute ceremony Sept. 9, 2011, at Joint Base Pearl Harbor-Hickam, Hawaii. Barrett is the 15th Wing commander. (Defense Department photo/Master Sgt. Cohen A. Young)

Never stop trying

Master Sgt. Sonya Couture, an Afghan Air Force aviation life support adviser with the 438th Air Expeditionary Wing, discusses a training program with AAF life support section leaders at Kabul International Airport in Kabul, Afghanistan, Sept., 4, 2011. (U.S. Air Force photo/Staff Sgt. Matthew Smith)

Marching on

Staff Sgt. Deanna Dickson, a 192nd Security Forces Squadron patrolman, endures wind and rain during the Security Forces 9/11 Ruck March to Remember in Greenwood, Va., Aug. 25, 2011. Security forces squadrons from multiple bases are conducting a relay ruck march from San Antonio, Texas, to Ground Zero in New York City. The 192nd SFS is part of the Virginia Air National Guard. (U.S. Air Force photo/Tech. Sgt. Barry Loo)

In memory of United 93 copilot

LeRoy Homer, seen here in his Class of 1987 Air Force Academy yearbook photo, was the first officer on United 93 when it was hijacked Sept. 11, 2001. (U.S. Air Force photo)

We remember

Staff Sgt. Tomeka Gordon lights candles for a noon service in the Triangle Chapel at Keesler Air Force Base, Miss., in memory of the people who lost their lives in the terrorist attacks on 9/11. (U.S. Air Force photo/Kemberly Groue)

Building dedication honors Airman killed on 9/11

Melodie Homer cuts the ceremonial ribbon during the Operations Building Dedication Oct. 4 at Wright-Patterson Air Force Base, Ohio. The building was dedicated in honor of her late husband, Maj. LeRoy W. Homer Jr., who died Sept. 11, 2001. Overlooking the ribbon cutting are Col. (ret.) Robert Shondel; Col. Roger Gallet, the 445th Operations Group commander, Maj. Gen. Robert E. Duignan, the 4th Air Force commander; Ilse Homer, Major Homer's mother; Lt. Gen. Charles E. Stenner, the Air Force Reserve Command commander; Col. Stephen Goeman, the 445th Airlift Wing commander; Lt. Col. Chris Clark, the 445th Operation Group deputy commander; Laurel and Alden Homer, Major and Ms. Homer's children; and one other relative. (U.S. Air Force photo/Ben Strasser)

Building dedication honors Airman killed on 9/11

Members of the Homer and Thorpe families attend the Operations Building Dedication Oct. 4 at Wright-Patterson Air Force Base, Ohio. The building is named in honor of Maj. LeRoy W. Homer Jr., who died Sept. 11, 2001, while serving as the first officer on United Airlines Flight 93. (U.S. Air Force photo/Ben Strasser)

Pentagon Memorial dedication

Representatives of all the services' choruses perform at the Pentagon Memorial dedication ceremony Sept. 11. The national memorial is the first to be dedicated to those killed at the Pentagon on Sept. 11, 2001. (U.S. Air Force photo/Andy Morataya)

These colors don't fade

The B1-B Lancer static display is reflected in the sunglasses of Ed Woidt during the 9/11 memorial ceremony Sept. 11 at the South Dakota Air and Space Museum. Mr. Woidt is one of the Patriot Guard Riders who honor America's fallen heroes, veterans and members who continue to serve. (U.S. Air Force photo/Airman Corey Hook)

We remember

A memorial flag is illuminated near the spot where American Airlines Flight 77 crashed into the Pentagon on Sept. 11, 2001. (U.S. Navy photo/Petty Officer 1st Class Brandan W. Schulze)

Manas Airmen remember Sept. 11

Staff Sgt. Calvin Charles plays "Taps" during a memorial ceremony marking the sixth anniversary of Sept. 11, 2001, at Manas Air Base, Kyrgyzstan. About 350 personnel attended the ceremony, including a military formation of firefighters and defenders. Sergeant Charles is assigned to the 376th Expeditionary Services Squadron. (U.S. Air Force photo/Staff Sgt. Les Waters)