Tenley Tower, dating from the mid-1940s, was built by Western Union Telegraph Co. as part of an experimental microwave system for transmitting telegrams across the mid-Atlantic region, helping eliminate telegraph wires and poles from the landscape. It was also designed to relay newly invented television signals, giving Western Union and RCA an early advantage in the television revolution of the 1950s, and during the Cold War era the 90-foot tower handled national security communications before becoming a cellular telephone transmitter in 1996. Beginning in 1953, nearby Broadcast House at 40th and Brandywine Streets used this high point as the nation’s first production facility designed for both television and radio, with three WTOP TV studios and four WTOP radio studios; in the 1950s it produced Pick Temple’s Giant Ranch, where local children appeared as Giant Rangers, and it served as Washington’s CBS affiliate until WUSA-9 moved to 4100 Wisconsin Avenue in 1992, after which American University’s public radio station WAMU moved into 4000 Brandywine Street in 1993. Diagonally across the intersection stood N.M. Cohen and Samuel Lehrman’s third DC-area Giant Food Store, and when the first Giant opened in 1939 it helped end an era by replacing clerks who quoted prices and handed over orders with marked pricing, self-service, and efficient check-out.