Iran launches retaliatory strikes against Israel

Now on to the escalating conflict in the Middle East. Tonight, Iran is launching a new wave of retaliatory strikes after Israel's attack on the country's nuclear program. And Iran is now saying the United States was complicit in the attacks.It comes as NBC News learned the US helped shoot down Iranian missiles that were targeting Israel. The night cap is still here. Colonel Jack, you know, I'm going to you first.Israel is calling this a preemptive attack rather than preventative. explain to us the differenc ...