At 12:01 a.m. on April 7, 1933, sirens, fire alarms and train whistles shrieked. In Chicago, harried bartenders scrambled to serve crowds that stood 12 deep. At Pabst Brewing Co. in Milwaukee, thousands of onlookers cheered as company employees hoisted barrels and crates onto trucks. About 800 people stood in the rain outside the White House, watching as a man hopped out of his vehicle and unloaded two cases of beer. Secret Service agents accepted the goods, a gift for the chief executive from one of the nation's brewers. "President Roosevelt," read a sign on the side of the truck, "the first real beer is yours."After 13 dry years, legal beer had returned to the United States. . . .