Once in full operation, which could take years, the Yongbyon nuclear reactor would enable North Korea to produce 6 kilograms of plutonium a year to add to its nuclear weapons stockpile.
Dennis Rodman may not fit the standard diplomat's profile, but considering the lack of any civil contact between the US and North Korea, his basketball outreach is winning some fans.
Under President Obama, seven people have been prosecuted under the Espionage Act for leaking classified documents to the news media, compared with three during all previous presidencies. Here's a breakdown of prosecutions by administration.
When North Korea shut down the industrial park it jointly maintained with South Korea in April, it ratcheted tensions to a new high.
Analysts say that North Korea may be holding out for a high-profile visitor from the US before allowing Kenneth Bae’s release.
The Kaesong Industrial Complex, shuttered earlier this year, is one of the only areas of cooperation between rivals North and South Korea.