1952 [ January ] [ February ] [ March ] [ April ] [ May ] [ June ] [ July ] [ August ] [ September ] [ October ] [ November ] [ December ] The following pages contain high resolution photos that can be downloaded for printing. February 18 February 1952 Greece and Turkey accede to the North Atlantic Treaty Organisation 20 February 1952 North Atlantic Council Meeting at the level of Foreign Ministers April 4 April 1952 Appointment of Secretary General Lord Ismay 16 April 1952 Opening of NATO Headquarters at Palais de Chaillot May 1 May 1952 Appointment of Supreme Allied Commander Europe (SACEUR) General Matthew B. Ridgeway (US)