 Complete the following phrase:  Indonesia purchased 12 OV-10F aircraft and operates them in COIN operations similar to the U.S. Navys Vietnam missions with their Broncos, but have retrofitted .50 in 12.7 mm Browning heavy machine guns in place of the .308 in 7.62 mm machine guns. These aircraft were based in Lanud Abdulrachman Saleh Air Force Base in Malang, East Java and were vital in the 