26 May, 1972: The Soviet Union and the United States sign the Anti-Ballistic Missile Treaty.

27 May, 1851: The world's first chess tournament is held in London.

28 May, 1998: Pakistan conducted its first nuclear weapon test by detonating five atom bombs.

29 May, 1917: John F. Kennedy, the 35th President of the United States of America, is born.

30 May, 1911: The first Indianapolis 500 is held.

31 May, 1859: The Great Clock housing Big Ben starts keeping time.

1 June, 1926: Marilyn Monroe, American model, actress and singer, is born.