Military personnel representing 38 African nations begin the scenario-driven exercise portion of Africa Endeavor 2013, Aug. 12, 2013, at an air force base in Lusaka, Zambia, after six days of preparation and planning. Africa Endeavor is U.S. Africa Command's annual 10-day communications exercise and focuses on information sharing and interoperability between African nations. (U.S. Army National Guard photo by Spc. Zach Sheely/RELEASED)