In five months in office, UN Secretary-General António Guterres, has so far publicly avoided challenging new US President Donald Trump.
But on Tuesday, he threw the equivalent of a last-minute "Hail Mary" pass during a speech at New York University -- making the case for the US to remain committed to the Paris climate accord in terms that he hoped would change Trump's mind, by warning of a drop in the US's global influence if it pulls out of the agreement.
Barnett Rubin speaks with Amanpour, CNN’s International's flagship program for global affairs hosted by Chief International Correspondent Christiane Amanpour.
CNN TRANSCRIPT Aired July 29, 2015 - 14:00:00 ET
AMANPOUR: And just ahead, for years we've wondered whether Mullah Omar was dead or alive. He hasn't been seen since around 9/11. I asked
world renowned expert Barnett Rubin what difference his death would make now. That's next.