米海軍、2019年中にはF-35のIOC獲得を宣言しない見込み
https://twitter.com/navyrecognition/status/979609125222002689?ref_src=twcamp%5Eshare%7Ctwsrc%5Eios%7Ctwgr%5Eother%7Ctwcon%5E7100%7Ctwterm%5E0

BREAKING: @USNavy likely won't declare #F35 IOC until 2019, RADM Horan tells me in his first interview as director of the F-35C Fleet Integration Office.
Navy needs to see successful demonstration of 3F software during IOT&E first, he says. Story TK @AviationWeek