programs ever attempted by a television station at that time. By 1955, WBAP-TV—which had earlier ordered RCA color television equipment in the fall of 1949, and became the first television station in Texas to broadcast NBC programs in color on April 9, 1954—had greatly increased the number of programs that it broadcast in color, televising the largest amount of programming produced in the format of any U.S. television station at the time. Ownership of Star-Telegram and the WBAP stations would transfer to Amon Carter Sr.'s heirs after he succumbed from the last of several heart attacks he had suffered over the previous two years on June 23, 1955. Meanwhile, NBC grew frustrated with having to maintain affiliations with two stations to carry its programming in an otherwise effectively consolidated market. In early 1957, a taller transmission tower was built at the west end of the Broadcast Hill studio property. However, NBC threatened to strip its affiliation from Channel 5 if it did not relocate its transmitter farther eastward to extend the station's signal deeper into the Dallas metropolitan area; reportedly, the network approached the owners of Fort Worth's other station, independent KFJZ-TV (channel 11, now KTVT), which had in 1962 moved its transmitter to the antenna farm in Cedar Hill. Belo also made an attempt to make WFAA-TV the market's exclusive NBC affiliate. To prevent the network from defecting, Carter's heirs—who were reluctant to comply to NBC's demands at first, out of their desire to continue Amon Carter Sr.'s legacy of pro-Fort Worth civic boosterism—agreed to move WBAP-TV's transmitter facilities to Cedar Hill and boost its effective radiated power to adequately cover Dallas; in the summer of 1964, it installed a transmitter at the Hill Tower (owned by the Dallas Newspapers) to feed the channel 5 antenna on a candelabra tower that was already shared by WFAA-TV and KRLD-TV (channel 4, now KDFW-TV); sister station WBAP-FM also moved its transmitter to this location. The move to Cedar Hill allowed channel 5 to become the sole NBC affiliate for the entire Dallas–Fort Worth market on September 1, 1957, and subsequently, WFAA-TV became the area's exclusive ABC station. In October 1959, WBAP-TV installed the first color videotape recorder in Texas, allowing it the ability to record a 90-minute segment of programming and replay it in less than five minutes. During NBC's coverage of the assassination of President John F. Kennedy on November