As its members struggle with fiscal crisis and economic stagnation, NATO is launching a plan to reinvent itself. Will it be enough to hold the alliance together? Maybe. But it will require that nations trust one another enough to depend on each other’s military capabilities. It seems likely under such an arrangement that some nations will carry a bigger burden for the defense of the West while others get a free ride. But the bigger question is whether NATO is strong enough to pull off what is likely to be a massive task of coordination.