U.S. Marine Corps MV-22B Ospreys with SPMAGTF - Crisis Response - Africa prepare to fly at night as part of required training standards in order for pilots to continue to be qualified to carry passengers at night. while in support of Operation United Assistance in Monrovia, Liberia, Nov. 16, 2014. United Assistance is a Department of Defense operation to provide command and control, logistics, training and engineering support to U.S. Agency for International Development- led efforts to contain the Ebola virus outbreak in West African nations. (U.S. Marine Corps photo by Lance Cpl. Andre Dakis/SP-MAGTF Crisis Response Africa Combat Camera/Released)