"It was quite a surprise to us when the first Hamburg raid took place because you used some new device which was preventing the anti-aircraft guns to find your bombers, so you had a great success and you repeated these attacks on Hamburg several times and each time the new success was greater and the depression was larger, and I have said, in those days, in a meeting of the Air Ministry, that if you would repeat this success on four or five other German towns, then we would collapse." – Albert Speer – "The Secret War"