The United States used to call wayward members of NATO back to the reservation with a whistle or a shout. It decided what was deviation from doctrine, and that decision was pretty much law.
United States and its main European allies broadly share a common view of the problems facing the world – from Afghanistan and nuclear disarmament to the economic crisis.
Superficially the first appearance of the new American president among the world political beau monde was more than impressive: participation in three actions at the highest level at once plus five hundred of accompanying persons. Much more important, however, how efficient this opening to him Europe as well as his opening to Europe turned out to be.