The president fielded questions on Iraq before heading to Baghdad for an unannounced visit.
The president made few concrete gains in his first overseas trip, but helped begin remaking America's image in the world.
Readers write about the challenge North Korea poses for China and the US, what Congress can learn from Secretary of Defense Robert Gates, and an accused Nazi guard.
Federal student debt now tops $500 billion, leading some students to ask for debt forgiveness as a form of stimulus. Washington is wary.
US president discussed Armenian massacre, democracy, and EU membership.
Security Council's struggle to respond to Sunday's rocket launch also portends challenges for Obama's nonproliferation goals with Iran.