The Lockheed F-35 is an advanced stealth fifth generation fighter combining speed and superb agility. There are three variants; F-35A, B and C. The F-35A CTOL (Conventional Take Off and Landing) and has four internal weapons stations in two weapons bays plus three optional external weapons stations. The F-35B STOVL (Short Take Off Vertical Landing) variant while the F-35C is a CV (Carrier Variant). The F-35 will replace the USAF A-10 and F-16, the F/A-18 for the USN and the F/A-18 and AV-8B Harrier for the USMC. On September 30, 2014 South Korean placed an order for 40 F-35A Lightning II with the first deliveries to begin in 2018. On March 28, 2018 the first ROKAF F-35A (AW-1) 18-001 rolled out at Fort Worth and completed its maiden flight the following day. This aircraft was sent to Luke AFB where it will be used for pilot training. The first F-35A delivery to South Korea occurred in March 2019 with the arrival of 2 aircraft at Cheongju AB. Completion of the F-35 order is expected by late 2021 or early 2022.