An F-15C Eagle crew chief performs maintenance at Leeuwarden Air Base, Netherlands, March 24, 2017. F-15C's from the Lousiana and Florida Air National Guard's 159th Expeditionary Fighter Squadron deployed to Europe to participate in a theater security package. The F-15s will conduct training alongside NATO allies to strengthen interoperability and to demonstrate U.S. commitment to the security and stability of Europe. (U.S. Air Force photo/Tech. Sgt. Staci Miller)