Arpad Lepper, the Offutt Air Force Base Fire Department station chief and ceremonial guardsman, rings a bell to honor those who were lost in the Sept. 11, 2001 terrorist attacks during a 9/11 memorial tribute held Sept. 11 at Offutt AFB, Neb. The “Four Fives” tradition, also referred to as the “5-5-5-5” code, was adopted from New York firefighters and has been used in firehouses since as late as 1865. The ringing of the bell honors all who were lost and never found. (U.S. Air Force photo by Jeff W. Gates)