ANNOUNCER: This is CNN Breaking News.</s>BLITZER: All right, there's breaking news coming into THE SITUATION ROOM now. Another U.S. military aircraft has had a close encounter in international air space. This time the Pentagon says Chinese fighter jets carried out what they call an unsafe intercept. Brian Todd is tracking this development for us. Brian, what are you finding out?</s>BRIAN TODD, CNN CORRESPONDENT: Wolf, we're getting this just in from the Pentagon from a U.S. Defense official telling CNN that at least two Chinese J-11 tactical aircraft, those are fighter jets, that they carried out what's called an unsafe intercept of a U.S. reconnaissance plane over the South China Sea. This occurred on Tuesday according to the Defense official. At one point these two Chinese jets, according to this official came within 50 feet of the American aircraft. Again, this occurring over the South China Sea near those disputed islands that China has been constructing air strips on and landing military planes on. That they're hotly disputed between China and other nations in that region. Also the U.S. does not consider them legitimate Chinese territory, Wolf. But again, we're being told two Chinese fighter jets, J-11s, came fairly unsafe distance away from a U.S. reconnaissance plane, within 50 feet of it, on Tuesday over the South China Sea. My colleague Jim Sciutto points out for some context this isn't the first time this has happened, but the Chinese usually resort to warnings for American reconnaissance jets over the radio. They usually don't fly this close. This is a relatively rare occurrence and we're told by this U.S. official that Americans are protesting this through diplomatic and military channels.</s>BLITZER: Very disturbing development. Brian, thank you. Coming up, Donald Trump says he would have no problem talking with North Korea's Kim Jong-un. Will that change after today's foreign policy session with Henry Kissinger? And tensions are boiling over among Democrats. And some worry the party's convention could slide into chaos. Are the battle lines already drawn?
Unsafe Intercept by Chinese Jets.