The peaceful invasion of Britain by GIs began in January 1942. Soon the Yanks were everywhere, complaining about Britain's warm beer and cold weather, teaching British girls to jitterbug, and spending their money freely - giving rise to the popular phrase overpaid, over-sexed and over here. But the GIs had come to fight; the 8th Air Force flew perilous daytime bombing raids deep into Germany, and US troops fought a desperate D-Day battle on the beaches of France. 50 years on, this is the story of those wartime years, in pictures and in the words of the GIs who came and the British people who made them welcome - most of the time.