LANGLEY AIR FORCE BASE, Va. -- Langley Airmen and local community members participate in Freedom Walk, as doves are released at Langley Speedway Sept. 11. Freedom Walk was held in remembrance of those lost during 9/11 terrorist attacks and to honor our military members and first responders. (U.S. Air Force photo/Senior Airman Zachary Wolf)

LANGLEY AIR FORCE BASE, Va. -- Members of the Norfolk Police Department Honor Guard present the colors while the National Anthem plays during Freedom Walk at Langley Speedway Sept. 11. Freedom Walk was held in remembrance of those lost during 9/11 terrorist attacks and to honor our military members and first responders. (U.S. Air Force photo/Senior Airman Zachary Wolf)

LANGLEY AIR FORCE BASE, Va. -- Chaplain (Col.) Scott Henry, 1st Fighter Wing Chapel, gives an invocation to kick off Freedom Walk at Langley Motor Speedway Sept. 11. Freedom Walk was held in remembrance of those lost during 9/11 terrorist attacks and to honor our military members and first responders.(U.S. Air Force photo/Senior Airman Zachary Wolf)

LANGLEY AIR FORCE BASE, Va. -- Tech. Sgt. Ronald Denisi, 1st Security Forces Squadron kennel master, explains the capabilities of military working dogs to the crowd gathered for Freedom Walk at Langley Speedway Sept. 11. Freedom Walk was held in remembrance of those lost during 9/11 terrorist attacks and to honor our military members and first responders. (U.S. Air Force photo/Senior Airman Zachary Wolf)