
The F-35B reached initial operational capability (IOC) with US Marine Corps in July of 2015. There are three models of this aircraft, the conventional takeoff and landing (CTOL) F-35A which will reach IOC with the USAF this year, the short takeoff and vertical landing (STOVL) F-35B, and the folding wing, heavy airframe, carrier version F-35C, which is due to reach IOC with the USN in 2018. Evolved from the JSF competition prototype, this aircraft is due to replace the F-15, F-16, F-18, AV-8B, and for some CAS missions the A-10, although there are rumors the USAF is considering opening a competition to replace the A-10 with a new aircraft.
Currently the aircraft is nearing the end of the test and evaluation phase and is in low-rate initial production. Lockheed is preparing to ramp up to full rate production in the near future at its massive Fort-Worth aircraft plant. To say this aircraft is controversial is an understatement and it has been the target of enormous criticism, speculation and western leftist and Russian disinformation campaigns. Probably the most egregious lie told is that $1.5 trillion has been spent on aircraft development thus far. In reality, around $1 trillion is the estimated total cost of ownership for the entire US buy of 2500+ aircraft for 50 years. That includes purchasing all the aircraft, bases, schools, pilot training, tech training, maintenance and spare parts. Politics and disinformation warfare being what it is though, the number increases whenever convenient just to increase its scariness and to make it seem as astounding as possible. It turns out, however and unsurprisingly, that if those numbers are run for any fighter aircraft you get similar or greater costs over that timeframe.