Ms. Heidi Grant, deputy under secretary for international affairs, speaks to a group of South African students who were touring U.S. military aircraft at the African Aerospace and Defense Expo at Waterkloof Air Force Base, South Africa, Sept. 14, 2016. The U.S. military is exhibiting a C-17 Globemaster III, a KC-135 Stratotanker, a C-130J Super Hercules, an HC-130 King, and an MQ-9 Reaper. The aircraft come from various Air National Guard and Air Force Reserve Command units. The U.S. routinely participates in events like AADE to strengthen partnerships with regional partners. (U.S. Air Force photo by Tech. Sgt. Ryan Crane)