President Barack Obama announced Wednesday that the top U.S. commander in the Afghan war, Gen. Stanley McChrystal, will be replaced by Gen. David Petraeus, the head of U.S. Central Command. Ray Suarez speaks with analysts about what the decision could…

Just days after announcing an escalation in Afghanistan, President Obama traveled to Oslo to accept the Nobel Peace Prize. Jim Lehrer speaks with a panel of experts for reactions and perspective on the president's task in Oslo.

As the theme of Wednesday's Democratic national convention is national security, the role of the military and foreign policy has played heavily into the night's events. Military veterans who are supporting Senator Barack Obama give their view on the election…