A typical Thanksgiving Day on Puget Sound is windy, rainy, and chilly. But in 1925, on the eve of the feast day, a clear night allowed the full moon to light up the shore at Woodmont Beach, which is roughly 12 miles south of Seattle, Washington. Federal agents, acting on a tip, had set up a stakeout, and they were not misled: soon the sound of unmuffled twin marine engines—straight eight-cylinder 300-hp Sterling Dolphins—broke the silence.