The painful truth is that NATO may be suffering from a terminal illness. Its current mission in Afghanistan, the alliance's most significant and far-flung muscle-flexing to date, might be its last. Afghanistan has been the graveyard of many an imperial power from the ancient Macedonians to the Soviets. It now seems to be eyeing its next victim.

For NATO, this year should have been a celebration, not a dirge. After suffering a transatlantic rift of epic proportions during the Bush years, the alliance thrilled to the election of Barack Obama and his politics of conciliation. The new American administration swore it would shift troops from Iraq to Afghanistan to give NATO more of what it wanted to fight "the right war." Vice President Joe Biden and Secretary of State Hillary Clinton both promised to push the "reset button" on U.S.-Russian relations, potentially removing one of the greatest obstacles to NATO's health and well-being. And in a final flourish for the alliance's diamond jub