The letter "B" is for backpack
U.S. Air Force Senior Airman Tiffani-Amber Petit, a physical therapy technician with the 509th Medical Operations Squadron, right, helps adjust the backpack straps for Delilah Gordon, a pre-kindergarten student who is the daughter of Staff Sgt. Samuel Gordon, during the Back-to-School Brigade event at Whiteman Air Force Base, Mo., Aug. 8, 2017. Petit made sure the backpack fit comfortably and did not weigh more than 10 percent of the student’s bodyweight. (U.S. Air Force photo by Staff Sgt. Danielle Quilla)

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Photo by: Staff Sgt. Danielle Quilla |  VIRIN: 170808-F-OL040-1007.JPG