WASHINGTON — President Obama re-affirmed American support of South Korea on Friday telling President Park Geun-hye that the U.S. commitment to her nation's security "will never waver" in face of threats by nuclear-armed North Korea.

"Pyongyang’s nuclear and missile programs have achieved nothing except to deepen North Korea’s isolation," Obama said during a news conference after meeting with Park at the White House.

Also during the news conference, Obama said:

-- Iran has often violated rules on missile testing, but said the recent agreement with the U.S. is designed only to keep Tehran from development a nuclear weapon; the U.S. and allies will continue to pressure Iran over missile testing and other bad behaviors.