Listen to British Prime Minister Winston Churchill address a joint U.S. Congress session after Pearl Harbor

CHURCHILL: Many people have been astonished that Japan should, in a single day, have plunged into war against the United States and the British Empire. They have certainly embarked upon a very considerable undertaking [laughing]. What kind of a people do they think we are? Is it possible they do not realize that we shall never cease to persevere against them until they have been taught a lesson which they and the world will never forget?

[Music]