That a cross-Channel attack against the Atlantic Wall could even be contemplated was a tribute to what Dwight Eisenhower called “the fury of an aroused democracy.” What made D-Day possible was the never-ending flow of weapons from American factories, the Ultra and the Double Cross System, victory in the Battle of the Atlantic, control of the air and sea, British inventiveness, the French Resistance, the creation of citizen armies in the Western democracies, the persistence and genius of Andrew Higgins and other inventors and entrepreneurs, the cooperation of business, government, and labor in
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