(Prime Minister Winston S Churchill's speech to the House of Commons on 20th August 1940 was not recorded at the time, but re-recorded by him some years later - after the end of the conflict, I believe)
Apart from the dramatic content of this speech, what is so wonderful about it and so many others of his speeches is the sheer quality and elegance of most of his writing; a veritable masterclass in the use of the modern English language.