U.S., North Korea offer dueling accounts of talks breakdown

HANOI, Vietnam -- In open dispute, the U.S. and North Korea offered contradictory accounts Thursday of why the summit between Donald Trump and Kim Jong Un broke down, though both pointed to punishing American sanctions as a sticking point in the high-stakes nuclear negotiation. President Trump, who returned to the White House Thursday night, said before leaving Hanoi that the talks collapsed because North Korea's leader insisted that all the sanctions the U.S. has imposed on Pyongyang be lifted