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 the "predominant news voice in America." Affectionately known as "Uncle Walter," he covered many of the important news events of the era so effectively that his image and voice are closely associated with the Cuban Missile Crisis, the assassination of President John F. Kennedy, the Vietnam War, the Apollo 11 Moon landing, and the Watergate scandal. "USA Today" wrote that "few TV figures have ever had as much power as Cronkite did at his height." Enjoying the cult of personality surrounding Cronkite in those years, CBS allowed some good-natured fun-poking at its star anchorman in some episodes of the network's