On National Wreaths Across America Day, items are seen on top of the headstone of the Extortion 17, service members who lost their lives during a tour of duty in Afghanistan, Sat., Dec. 14, 2019 at Arlington National Cemetery in Arlington, Va. National Wreaths Across America Day is held annually to celebrate the lives of military veterans. NASA astronaut Doug Wheelock served with the Extortion 17 and honored them as well as those who lost their lives in the quest for space exploration by laying wreaths at their headstones and at the memorial sites. Photo Credit: (NASA/Aubrey Gemignani)