In 1893, the U.S. Postal Service issued its first commemorative stamp to honor the World’s Columbian Expedition and the quadricentennial of Christopher Columbus’ voyage. In 1921, religious services were broadcast on radio for the first time as KDKA in Pittsburgh aired the regular Sunday service of the city’s Calvary Episcopal Church.

In 1893, the U.S. Postal Service issued its first commemorative stamp to honor the World’s Columbian Expedition and the quadricentennial of Christopher Columbus’ voyage. In 1921, religious services were broadcast on radio for the first time as KDKA in Pittsburgh aired the regular Sunday service of the city’s Calvary Episcopal Church.