Less than 24 hours after the September 11 terrorist attacks on the United States, America's allies in the North Atlantic Treaty Organization came together to invoke the alliance's Article 5 defense guarantee--this "attack on one" was to be considered an "attack on all. "When it came time to implement that guarantee, however, in the form of the American-led military campaign in Afghanistan, NATO remained on the sidelines--by U.S. choice. The Americans decided not to ask for a NATO operation for both military and political reasons--only the United States had the right sort of equip