In his short tenure as North Korea's leader, Kim Jong Un has done a lot to put far richer and stronger nations in an increasingly difficult spot. AP hide caption
nuclear program
Shahram Amiri, an Iranian nuclear scientist, attends a news briefing while holding his son Amir Hossein as he arrives at the Imam Khomeini airport just outside Tehran, Iran, after returning from the United States in 2010. Vahid Salemi/AP hide caption
This 2011 photo shows the heavy water nuclear facility near Arak. International sanctions relief will be triggered when Iran follows through on commitments to reduce its nuclear program. Hamid Foroutan/AP hide caption