Center, U.S. Air Force Col. Sean Tyler, 633rd Air Base Wing commander, signs the Fire Prevention Week proclamation in the presence of senior leadership at Joint Base Langley-Eustis, Va., Oct. 6, 2017. Fire Prevention Week commemorates the great Chicago fire of 1871, which killed more than 250 people, left 100,000 homeless and destroyed more than 17,400 buildings. (U.S. Air Force photo by Airman 1st Class Anthony Nin Leclerec)