Capt. Moises A. Navas and Gunnery Sgt. Diego D. Pongo were killed in Iraq on Sunday while on a mission inside an ISIS stronghold. Four other service members were wounded during the mission. It took U.S. forces six hours to navigate the extreme terrain in order to recover their remains. Marine Gen. Kenneth McKenzie commented that the terrain in the area was mountainous and some of the worst in the world, including vertical areas that needed to be crossed at certain points. He also stated that they recovered the bodies as fast as possible and there was no way to do it quicker.