"Israel already build the Kfir and hte Lavi." -- The Kfir was nothing but a re-engined Mirage clone with a not so successful service career. The Lavi existed only as a prototype, was never completed in fully operational capability. All performance claims are more or less guesswork.
Judge orders Jerusalem Gay Pride attacker to undergo psychiatric evaluation (Haaretz)
from the article: U.S. may scrap F35, set to be Israel's fighter jet of the future