A Joint Base Andrews Fire Department firefighter crew chief holds a helmet during the 2016 National Capital Region 9/11 Memorial Stair Climb and 5K Walk at the Gaylord National Resort and Convention Center at National Harbor, Md., Sept. 10, 2016. Approximately 21 military members from the Joint Base Andrews Fire Department and 11th Security Forces Squadron attended the event to climb 110 flights of stairs in honor of the 343 who made the ultimate sacrifice due to the terrorist attacks on Sept. 11, 2001. (U.S. Air Force photo by Airman 1st Class Valentina Lopez)