His cooperative tone helped some leaders begin to move beyond historical grudges against the US.
Lawmakers face issues ranging from a huge deficit and bank regulations to healthcare reform and climate change.
Readers write about the US ban on assault weapons, carbon taxes, the "tea party" protests, and why the US should maintain its current policy toward Taiwan.
British Columbia's 'private-public partnerships' have been touted as a model for the US to revamp its infrastructure.
Mahmoud Ahmadinejad tells Iran's judiciary to uphold Roxana Saberi's legal rights.
The dramatic drop in violenc over the past year is due in part to US-led efforts. But the insurgency could linger.
The president's decision not to prosecute CIA agents for torture is being criticized by right advocates.
Despite worries that the agenda would be hijacked by a debate about America's Cuba policy, the Summit of the Americas finished with a feeling of goodwill.