U.S. President Barack Obama has replaced the architect of his Afghan war strategy with the general credited with turning around the Iraq campaign. General Stanley McChrystal, commander of foreign forces in Afghanistan, was replaced by his boss, General David Petraeus, just as the nine-year-old war reaches a critical stage. With the insurgency growing despite more foreign troops, the government making peace moves to the Taliban, and renewed interest in reports of fabulous mineral resources, following are some questions and answers about the situation today. Read more