President Trump warns 'a whole civilization will die tonight' if Iran doesn't make a deal

Let's get to Megan Cassella this morning. Talk more about the deadline coming up tonight. Morning, Megan. >> Good morning, Carl from the White House where we are very much on the brink this morning of a vast escalation of this war. Just in the last hour, as you guys have been talking about, the president making clear in that true social post that he is holding firm to his 8:00 p.m. deadline tonight for Iran to make a deal. He wrote, quote, "A whole civilization will die tonight, never to be brought back aga ...