Alfred Vail receives and Samuel Morse’s telegraph message, “What hath God wrought.” The message was transmitted from the U.S. Supreme Court room to the Mount Clare Station of the B&O Railroad in Baltimore, Maryland. Vail then transmitted the message back to Morse. May 24, 1844. | Location: Mount Clare Station, B&O Railroad, Baltimore, Maryland, USA. (Photo by Library of Congress/Corbis/VCG via Getty Images)