CBS Evening News a one-evening test broadcast on August 19, 1965, before permanently switching to the format on January 31, 1966. Cronkite's prime time special report, "Who, What, When, Where, Why", broadcast on February 27, 1968, ended with his declaration that the United States could only hope for a stalemate in Vietnam. It is often credited with influencing Lyndon Johnson's decision to drop out of the race for President. "If I've lost Walter Cronkite ... [I]'ve lost Middle America", he stated. Under Cronkite, the newscast began what would eventually become an 18-year period of dominating the ratings among the network evening news programs.
Walter Cronkite break. Just before the second half of "ATWT" was to begin, the network broke in with the bumper slide a second time. In this bulletin Cronkite reported in greater detail about the assassination attempt on the President, while also breaking the news of Governor Connally's shooting. Cronkite then recapped the events as they had happened: that the President and Governor Connally had been shot and were in the emergency room at Parkland Hospital, and no one knew their condition as yet. CBS then decided to return to "ATWT", which was now midway through its second segment. The cast had continued