WASHINGTON (Reuters) - U.S. President Donald Trump gave his  in principle  approval to lift restriction on South Korea s missile payload capabilities, the White House said on Monday. Trump agreed to strengthen joint military capabilities during a call with South Korean President Moon Jae-in and gave  conceptual approval  for South Korea to buy billions of dollars of weapons from the United States. North Korea said it tested an advanced hydrogen bomb for a long-range missile on Sunday, prompting global condemnation and a U.S. warning of a  massive  military response if it or its allies were threatened. 
Trump says to approve lifting restrictions on South Korea missile payload limits