Image 0 of 5Soldiers fire an M252A1 81mm mortar system at a firing range at night in Grafenwoehr, Germany, Oct. 20, 2017. The soldiers are paratroopers assigned to Headquarters Company, 2nd Battalion, 503rd Infantry Regiment (Airborne). (Staff Sgt. Alexander C. Henninger/Army) Recruits of Hotel Company, 2nd Recruit Training Battalion watch a rappel demonstration on Parris Island, S.C. Recruits rappel from the 47-foot-tall tower wearing a safety harness, helmet and gloves to gain confidence and overcome any fear of heights. (Cpl. Joseph Jacob/Marine Corps) A Marine assigned to the 1st Law Enforcement Battalion, I Marine Information Group, fires a M240B machine gun during a night live fire training exercise at Camp Pendleton, Calif. (Lance Cpl. Anabel Abreu Rodriguez/Marine Corps) Four F/A-18C Hornets, assigned to the Checkerboards of Marine Strike Fighter Attack Squadron (VMFA) 312, fly in formation over Wake Island and the aircraft carrier USS Theodore Roosevelt (CVN 71) during a U.S. Navy Heritage event for the crew, Oct. 26, 2017. (Mass Communication Specialist 3rd Class Anthony J. Rivera/Navy) A 48th Fighter Wing Airman embraces a family member at Royal Air Force Lakenheath, England, after returning from a deployment Oct. 11. (Airman 1st Class Eli Chevalier/Air Force)