The Lockheed Martin F-35 Lightning II (also known as the F-35 Joint Strike Fighter) is a family of single-seat, single-engine, fifth-generation multirole fighters under development to perform ground attack, reconnaissance, and air defense missions with stealth capability. The F-35 has three main models; the F-35A is a conventional takeoff and landing variant, the F-35B is a short take-off and vertical-landing variant, and the F-35C is a carrier-based variant.
F-35 JSF development is being principally funded by the United States with additional funding from partners. The partner nations are either NATO members or close U.S. allies. The United Kingdom, Israel, Italy, Australia, Canada, Norway, Denmark, the Netherlands, and Turkey are part of the active development program; Japan has ordered the F-35, while Singapore may also equip their air force with the F-35. South Korea decided to purchase 40 F-35s in late 2013.