North Korea, US leaders 'emotionally entangled' in tensions

An expert on US and North Korea relations says the countries' respective leaders are becoming 'emotionally entangled' in their ongoing back-and-forth. It comes after a top North Korean official this morning accused Donald Trump of declaring war against his country, following an aggressive tweet the US leader posted in the weekend. Sung-Yoon Lee, assistant professor of Korean studies at Tufts University in Boston, spoke to Susie Ferguson about the ongoing tensions.