North Korea threatens to revive nuclear program over U.S. sanctions

North Korea threatened on Friday evening to revive nuclear development if the U.S. doesn't lift economic sanctions against the country, the Associated Press reports.

The big picture: North Korea did not threaten to walk away from ongoing negotiations with the U.S., but the Foreign Ministry said in a statement that the "improvement of the relations and sanctions is incompatible," per the AP. A professor of North Korea studies at Dongguk University in Seoul, Dr. Koh Yu Whan, told the AP that the threats aren't serious yet, and that North Korea wants "to vent their complaints out loud."