The role of the supreme leader has changed, but Iran's top cleric, Ayatollah Khamenei, still holds sway. How the political system in Tehran works, and who will determine what comes next.
From arms control to Afghanistan, analysts say the deals brokered by Obama and Medvedev could profoundly reshape global security.
National parks' fee-free weekends, a money tale from Niall Ferguson, opera for Bellini fans, and more.
Twitter, Youtube, and the force of the movement for change in Iran make it difficult for the government to paint the protesters as tools of foreign powers.
Emerging economic superpowers China and India may compete here. What should be the US role?
A senior cleric called Friday for British Embassy employees to be tried for allegedly inciting mass protests. The move signals a heightened effort to portray recent unrest as a foreign plot.
Some are criticizing the president's determination to engage Iran on its nuclear program amid a brutal government crackdown in the aftermath of what many say is massive election fraud.
US forces are pushing deeper into Helmand Province, where Americans promoted development throughout much of the cold-war era.