Secretary of State Clinton and Defense Secretary Gates will be back on Capitol Hill today to answer more questions about the president's new plan for Afghanistan. They'll be joined by Chairman of the Joint Chiefs of Staff Admiral Mike Mullen.
Admiral Mullen spoke to Kiran Chetry on American Morning Thursday to talk about the unique challenges of sending 30,000 more troops to Afghanistan's rugged terrain by the summer of 2010.
Read more: Logistical problems could plague Afghan troop surge