<Table> <Tr> <Th_colspan="2"> F - 35 Lightning II </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> F - 35A Lightning II </Td> </Tr> <Tr> <Th> Role </Th> <Td> Stealth multirole fighter </Td> </Tr> <Tr> <Th> National origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> Manufacturer </Th> <Td> Lockheed Martin Aeronautics </Td> </Tr> <Tr> <Th> First flight </Th> <Td> 15 December 2006 (F - 35A) </Td> </Tr> <Tr> <Th> Introduction </Th> <Td> F - 35B: 31 July 2015 (USMC) F - 35A: 2 August 2016 (USAF) F - 35C: 2018, planned (USN) </Td> </Tr> <Tr> <Th> Status </Th> <Td> In service </Td> </Tr> <Tr> <Th> Primary users </Th> <Td> United States Air Force United States Marine Corps United States Navy See Operators section for others </Td> </Tr> <Tr> <Th> Produced </Th> <Td> 2006--present </Td> </Tr> <Tr> <Th> Number built </Th> <Td> 305 + as of 2 July 2018 </Td> </Tr> <Tr> <Th> Program cost </Th> <Td> US $1.508 trillion (through 2070 in then - year dollars), US $55.1 B for RDT&E, $319.1 B for procurement, $4.8 B for MILCON, $1123.8 B for operations & sustainment (2015 estimate) </Td> </Tr> <Tr> <Th> Unit cost </Th> <Td> F - 35A: $94.6 M (low rate initial production lot 10 (LRIP 10) including F135 engine, full production in 2018 to be $85 M) F - 35B: US $122.8 M (LRIP 10 including engine) F - 35C: US $121.8 M (LRIP 10 including engine) </Td> </Tr> <Tr> <Th> Developed from </Th> <Td> Lockheed Martin X-35 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> F - 35 Lightning II </Th> </Tr>

When is the f 35 going to be in service
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