Obama in Afghanistan on unannounced trip

Speaking to nearly 4,000 U.S. troops in Afghanistan after a secret overnight flight, President� Obama said they were making "important progress" against militants in Afghanistan.

Source: http://www.msnbc.msn.com/id/40492083/ns/world_news-south_and_central_asia/

DAVID LETTERMAN DAVID OBEY DAVID PATERSON DAVID PETRAEUS