The United States and NATO leaders insist the Afghanistan fighting coalition will remain whole despite France's plans to yank combat troops out early, but leaders wary of plummeting public support for the war are using an alliance summit Sunday to show they want to move quickly away from the front lines. 

With a global economic crisis and waning public support for the war in the backdrop, world leaders were opening the NATO summit to tackle Afghanistan's post-conflict future -- from funding for security forces to upcoming elections. 

President Obama and Afghan President Hamid Karzai were meeting Sunday on the sidelines of the summit. Their hour-long discussion is expected to focus on planning for Afghanistan's 2014 elections, as well as the prospect of a political settlement with the Taliban, a senior Obama administration official said. 

Public opinion in Europe and the United States is solidly against the war, with a majority of Americans now saying it is unwinnable or not worth continuing.