"The NATO states are not paying their fair share," the American president said. "We have been very generous to Europe," he continued, "and it is now time for us to look out for ourselves, knowing full well that the Europeans will not do anything for us simply because we have in the past helped them."
So said John F. Kennedy during a national security meeting with his staff in 1963.
At the time, NATO was just 14 years old. The issue of burden-sharing in the alliance was already a divisive topic, but the Soviet threat held things together. This year the alliance turned 70 – and as leaders of the bloc's 29 member states meet in London today to mark that anniversary, NATO's purpose and future are more uncertain than ever.