A child watches as a 3rd U.S. Infantry Regiment relief commander and sentinel participate in a Changing of the Guard ritual prior to the 150th Presidential Armed Forces Full Honor Wreath-Laying Ceremony at Arlington National Cemetery in Arlington, Va., May 28, 2018. The guard is changed every hour from Oct. 1 to March 31 and every half hour from April 1 to Sept. 30. (U.S. Air Force photo by Staff Sgt. Jordyn Fetter)