NBCUniversal Inc. May 21, 2019 3:46 am ‘Late Night': A Closer Look at Trump's Iran Threats Seth Meyers takes a closer look at President Donald Trump’s comments on Twitter amid escalating tensions with Iran. US & World Videos 1:45 NYPD enters Columbia University in riot gear to clear protest 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 2:04 Arrests made, camps removed during pro-Palestinian protest at UConn 1:01 Biden administration plans to reclassify marijuana as a Schedule III drug