Trump tariffs are lose-lose for U.S. and EU, ambassador says

Relations between the U.S. and Europe took another hit Thursday when Commerce Secretary Wilbur Ross said the Trump administration would impose tariffs on European steel and aluminum. European Union Ambassador to the U.S. David O'Sullivan joins John Yang to discuss how the tariffs will affect the global economy and the alliance, plus the fallout from the U.S. withdrawing from the Iran deal.