Can You Find All 20 Ships -- Delayed by ice conditions in the Soo and western Lake Superior, these 20 are boats of the Pittsburgh Steamship Co. of U.S. Steel wait for the signal to start the journey north. Smoke pours from stacks of 12 ships. Sometimes the ore-carrying fleet has moved north by April 1, but this year unseasonably cold weather has kept ships from moving to the iron ore area unless an ice breaker clears a path. April 17, 1950.(Photo by AP Wirephoto).