APRIL 1, 1924: The Royal Canadian Air Force officially comes
into existence. APRIL 2, 1917: The preliminary artillery
bombardment of Vimy Ridge grows in intensity. APRIL 3, 1951: In
Korea, divisions of the Eight Army cross the 38th Parallel.
APRIL 4, 1949: The North Atlantic Treaty Organization is
established. APRIL 5, 1955: British Prime Minister Sir Winston
Churchill resigns. APRIL 6, 1941: Yugoslavia is invaded by
German forces. APRIL 7, 1994: Widespread slaughter of the
Rwandan population begins. The commander of the United Nations
peacekeepers, Canadian General Roméo Dallaire, finds himself
powerless to stop the unfolding massacre. APRIL 8, 1940: Denmark
and Norway are invaded by German forces. APRIL 9, 1917: At 5:30
a.m., the Canadian Corps launches its attack against Vimy Ridge
in France as part of the larger Arras offensive. The Canadians
advance in the midst of driving sleet and snow. APRIL 10, 1941:
Royal Air Force bombers attack Berlin. Among the ruins is the
historic opera house. APRIL 11, 1951: G