Well, it's never been used outside of testing scenarios and it's actual stats/capabilities are not really public knowledge. Very early testing was a disaster, i

Well, it's never been used outside of testing scenarios and it's actual stats/capabilities are not really public knowledge. Very early testing was a disaster, it missed every target it engaged. But I think about a year (maybe? maybe more?) of development later, it supposedly had a 100% hit rate albeit on a smaller number of targets. But THAAD isn't the only protection against missile strikes; there's a fairly heavy Patriot presence in the area and both Japan and the US have a fairly number of Aegis-equipped vessels in the area as well.