Charles Benedict Calvert telegraph, Samuel Morse and Alfred Vail. On April 9, 1844, Morse and Vail successfully tested their device by transmitting a message from the nation's capital to the Calvert home, Riversdale. This test came 45 days before the more celebrated event when Morse sent the message "What hath God wrought?" from Washington to Baltimore, along telegraph lines that ran above the Baltimore and Ohio Railroad line near Riversdale. Calvert became president of the Prince George's County, Maryland Agricultural Society and the Maryland State Agricultural Society, and served as vice president of the United States Pomological Society. He founded the first agricultural
Short C-23 Sherpa passenger aircraft, Shorts also planned two freight versions. The "Short 330-UTT" (for Utility Tactical Transport) was a military transport version fitted with a strengthened cabin floor and paratroop doors, which was sold in small numbers, primarily to Thailand, which purchased four. The "Short Sherpa" (not to be confused with the earlier Short SB.4 Sherpa experimental aircraft) was a freighter fitted with a full-width rear cargo door/ramp. This version first flew on 23 December 1982, with the first order for 18 aircraft being placed by the United States Air Force in March 1983. These aircraft were assigned to Military Airlift Command