September 6 1961: The nine foot diameter of these powerful fans used for ventilation at the East Boston end of the new tunnel dwarfed project engineer Irving R. Huie (left) and Clyde H. Galbraith, coordinating field engineer for the equipment maker. The bank of three fans could move up to a million cubic feet of air per minute. The new Lt. William F. Callahan Jr. tunnel would open on November 11, 1961, the 40th anniversary of the birth of the late war hero. Only son of Massachusetts Turnpike Commissioner William F. Callahan, the lieutenant fell in action April 14 1945. His death occurred during an attack in the mountains of northern Italy, a few weeks before World War II ended.