in Taiwan with a local partner firm, and the overall estimated contract value was 69 billion New Taiwan dollars (US$2.2 billion). However, after the election of President Tsai Ing-wen, who intends to make Taiwan's defense industry a cornerstone for future development, it was decided to domestically design and build 66 AIDC T-5 Brave Eagle supersonic trainers instead of selecting the T-50 or M-346. The T-5, with a program cost of NT$68.6 billion, will be a new aircraft whose design will draw upon Taiwan's expertise gained by building the domestically produced Indigenous Defense Fighter. In 2019 the Taiwan Air Force's Air Defense and Missile Command announced a five-year, NT$80b (US$2.54b) project to build up a full force of anti-radiation UAVs made by NCSIST. In 2021 April 15 NCSIST stated that its development of a next-generation fighter was progressing ahead of schedule and that the overall design and engine production would be completed by 2024. Foreign procurement One of the first modern jets purchased was the Northrop F-5. In 1974 a total of 308 were purchased but, lacking spare parts, the ROC has been forced to salvage them from inoperable F-5s. Taiwan is considering reusing engines from inoperable F-5s in cruise missiles. The Aerospace Industrial Development Corporation (AIDC), previously known as Aero Industry Development Center, was founded in 1969 under the authority of the Republic of China Air Force to locally produce spares and military aircraft. It was transferred to Chung-Shan Institute of Science and Technology (CSIST) in 1983. By 1973 AIDC had built 242 F-5Es and 66 F-5Fs under license. In 1992 Taiwan purchased 150 F-16A/B fighter jets from the United States. In the same year, 60 Dassault Mirage 2000-5s were ordered. Forty-eight would be single-seat Mirage 2000-5EI interceptors and 12 would be Mirage 2000-5DI trainers. The version of Mirage 2000-EI5 has the mid-air refuel capability and ground attack ability deleted. On February 28, 2007, the US Defense Department approved an order made by the ROC for 218 AIM-120C-7 AMRAAM missiles, as well as 235 AGM-65G2 Maverick missiles, associated launchers and other equipment. The total value of this order was revealed to be US$421 million. In June 2007, the Legislative Yuan also approved the upgrade of the existing Patriot PAC-2 batteries to PAC-3 standard, and, in November, the Pentagon notified the U.S. Congress of the Patriot upgrade order. On August 10, 2007, a shipment of Harpoon anti-ship missiles, valued at an