A. I am convinced he will use it whenever he becomes desperate. Why has he not used it before? The British know he has vast quantities of it. He may be afraid of reprisals. When he uses gas at all I should think it would be in a once-for-all storm. Imagine what the effect of a giant attack with a heavy gas might be on London where as many as 4,000,000 persons sleep in underground shelters. The English have virtually ceased to carry gas masks. At the beginning of the war not one person in a hundred appeared on the streets of London without one. Today not one person in fifty carries one. Hitler would probably not use gas at all except as a part of a knockout blow so violent that the British would not have a chance to strike back. Whatever the outcome, it is possible that such a mass gas assault might kill hundreds of thousands in one night. While the gas attack was being poured upon the large cities, in the hope also of wiping out the government and other leaders in urban headquarters, swarms of flat-bottomed scows and other vessels would put out from the coasts of the Channel and the North Sea, to make for landings at perhaps a dozen different places, anywhere along the coast of both England and Scotland. Some of these objectives would be feigned to divert English defense forces from the real ones, which might number five or six. Meanwhile great numbers of parachute troops would be landed to capture British airfields and hold them long enough for troop planes and gliders to land reinforcements, and these landings would also be attempted at the immediate rear of the coastal points where the German troops were coming in by sea. British authorities admit that it would be a serious matter if the Germans could establish one or more such bridgeheads on the coast and land heavy tanks, for the British even yet are not satisfactorily equipped with this indispensable weapon. The British believe they could concentrate and recapture any points seized by the Germans, but who knows? Crete showed what could be done with air-borne troops, and although the British Isles would be in most respects more difficult to capture than Crete, they would not be in all respects. The Germans are much nearer the British Isles, and could concentrate many times the force they used on Crete.