vineeta anand, and deborah wince-smith, thank you both very much. >> woodruff: now, to those special military units that brought down osama bin laden. and to ray suarez. >> suarez: the end of an eventful week found the president praising troops at fort campbell, kentucky, after a very public victory in the long war against al qaeda. >> thanks to the incredible skill and courage of countless individuals-- intelligence, military-- over many years, the terrorist leader who struck our nation on 9/11 will never threaten american again. >> suarez: but elsewhere on the sprawling base, well beyond the cameras' reach, the president earlier met with members of the special operations team that killed bin laden. >> it was a chance for me to say, on behalf of all americans and people around the world, "job well done." >> suarez: among them, operators from the naval special warfare development group-- often called "seal team six"-- and pilots from the 160th special operations aviation regiment, nicknamed "night stalkers". along with comrades from other so-called special missions units-- like the a