Why Iran deadline is trending

<p>President Donald Trump's 8 p.m. ET Tuesday deadline for Iran to make a deal to open the Strait of Hormuz is rapidly approaching. CNN’s Betsy Klein explains why the waterway is so critical and how Trump has doubled down on this threats to destroy “a whole civilization” if there’s no deal. Discover more videos, including live streams and exclusive storytelling, on our <a href="https://www.cnn.com/watch">Watch</a> page.</p>