Afghanistan: Tipping Point?

With so much attention focused on the military escalation in Iraq, it's easy to forget the other war -- the war to secure Afghanistan. Analysts fear a coming offensive from the Taliban this spring. Meanwhile, attacks continue from across the Pakistan border. House Speaker Nancy Pelosi is one of many voices asking for a "surge" in Afghanistan instead of Iraq. On a recent trip to that country, Pelosi spoke with the NATO commander in Afghanistan who said that we could very well lose the war there. Are we approaching a tipping point in the war in Afghanistan? Or is it possible that we have already passed it?