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Attack on U.S. base in Afghanistan kills at least six

Paula Bronstein / Getty Images

Sergeant Jay Kenney, 26, with the 101st Airborne Division, Task Force Destiny, assists wounded Afghan National Army (ANA) soldiers off the Blackhawk UH-60A helicopter after they were rescued in an air mission in Kandahar, Afghanistan, Dec. 12. According to sources, a large improvised explosive device caused casualties amongst both U.S. and ANA forces.

A suicide bomber drove a van packed with explosives into a building at an outpost in the south, collapsing a wall and burying troops. NBC's Atia Abawi reports.