 Complete the following phrase:  On November 22, 1963, NBC interrupted various programs on its affiliate stations at 1:45 p.m. to announce that President John F. Kennedy had been shot in Dallas, Texas. Eight minutes later, at 1:53:12 p.m., NBC broke into programming with a network bumper slide and Chet Huntley, Bill Ryan and Frank McGee informing the viewers what was going on as it happened; but since a camera was not in service, the reports were audio-only. However, NBC did not begin broadcasting over the air until 1:57 p.m. ET. About 40 minutes later, after word came that JFK was pronounced dead, NBC suspended regular programming and carried 71 hours of uninterrupted news coverage of the assassination and the 