From the story:
"We're aware that an aircraft from the U.S. landed at the Sunan Airport in Pyongyang at around 10:48 a.m.," an official said on condition of anonymity.Lee and Ling were arrested in March while working on a story for Current TV and later tried for illegally crossing the China-North Korea border. They were sentenced to 12 years hard labor.
*LA Times story here. New York Times here.