Republic of Singapore Air Force Military Expert 2 Wei Han Tan, crater repair instructor, uses a pavement saw while repairing chips in an airfield during Partner Nation Silver Flag, Feb. 14, 2016, at Andersen Air Force Base, Guam. The exercise is a small part of the first multilateral Silver Flag Exercise, a U.S. Pacific Command multilateral Theater Security Cooperation Program subject matter expert exchange event designed to build partnerships and promote interoperability through the equitable exchange of civil engineer related information. (U.S. Air Force photo by Senior Airman Joshua Smoot/Released)