" Never shall I fail my comrades. . . . I will shoulder more than my share of the task, whatever it may be, one hundred percent and then some. " from the Ranger Creed""In early March 2010, General Stanley McChrystal, the commanding officer of all U.S. and coalition forces in Afghanistan, walked with President Hamid Karzai through a small rural bazaar. As Afghan townspeople crowded around them, a Taliban rocket loudly thudded into the ground some distance...