Image 0 of 5Marine Corps recruit Jorge Pelaez crawls through mud during the final challenge of recruit training, known as the Crucible, at Marine Corps Recruit Depot Parris Island, S.C., Oct. 13, 2017. (Lance Cpl. Devon Burton/Marine Corps) A Navy F/A-18E Super Hornet aircraft receives fuel from an Air Force KC-135 Stratotanker during a mission over Iraq, Oct. 14, 2017, as part of Operation Inherent Resolve. (Staff Sgt. Michael Battles/Air Force) Sailors aboard the Military Sealift Command hospital ship USNS Comfort (T-AH 20) say a prayer for Sara Victoria Llull Rodriguiz, the first child born aboard Comfort in more than seven years. Comfort is underway operating in the vicinity of San Juan, Puerto Rico, to provide medical services around the island. (Specialist 1st Class Ernest R. Scott/Navy) U.S. Soldiers of 173rd Regiment, Brigade Support Battalion prepare for a convoy to a tactical operation center during exercise Swift Response 17 at the U.S. Army’s Joint Multinational Readiness Center (JMRC) in Hohenfels, Germany. (Spc. Randy Wren/Army) U.S. Navy Seabees, assigned to Underwater Construction Team (UCT) 2, prepare for underwater welding operations at Naval Base Guam, Oct. 19, 2017. UCT-2 provides responsive inshore and underwater construction capabilities under the guidance of Commander, Task Force 75. (Specialist 1st Class Arthurgwain L. Marquez/Navy)