Wikipedia 2015-02-26 - http://en.wikipedia.org/wiki/Hastings_Ismay,_1st_B...
In December 1956, Ismay decided to retire from NATO. He told the press that "he was not giving up his position for personal reasons, but because he felt it needed a fresh hand and a fresh brain." Paul-Henri Spaak was immediately chosen as his successor, but Ismay remained in office until May 1957, when he left with "the affection and respect" of all the NATO members. While Secretary General, Ismay is also credited as having been the first person to say that the purpose of the alliance was "to keep the Russians out, the Americans in, and the Germans down," a saying that has since become a common way to quickly describe the alliance.