Basically the US was doing some practice war games and a Chinese sub pops up right in the middle well within range of taking down the aircraft carrier Kitty hawk. This thing is surrounded by our warships and a sub for protection and noone even detected it.
If any country has the power and people to invade our shores it would be China.
http://www.dailymail.co.uk/pages/liv...n_page_id=1811