If you don't want to look through all his speeches the June 4, 1940: (Archived 2/6/99) - The famous "Fight on the Beaches" speech delivered before the House of Commons regarding the demise of France and the low countries, the debacle at Dunkirk and the egress of the British Expeditionary Force from the European mainland, and the readiness and resolve of Britain to resist invasion is here:
http://www.earthstation1.simplenet.com/pgs/churchill/dos-wc400604.ram.html.
Thank you! I didn't know that he had a speech impediment.