Answer:
1- Presidential debate --- 1960
2- Accidental broadcast of Oswald being killed --- 1963
3- Negative political ad, "Daisy" --- 1964
4- Neil Armstrong's moon walk --- 1969
Step-by-step explanation:
1- During the 1960 elections, which confronted Kennedy with Nixon, there were the first presidential debates in the country's history, televised throughout the nation.
2- Lee Harvey Oswald was an American socialist, pointed by the Warren Commission as President John F. Kennedy's lone assassin on November 22, 1963.
Almost two days after the arrest, Oswald was taken out of the detention center to a waiting catch transport in the garage area; this to be taken to the safer state prison (Dallas County Jail). But in front of cameras and in live TV suddenly a man penetrated through the crowd and fired at a distance of about 30 cm - a shot that hit Oswald in the stomach. The shooter, a well-known nightclub owner named Jack Ruby, was immediately overpowered and brought into the cell Oswald had just left.
3- Daisy was a political advertising video clip during the 1964 US presidential election that exploited the fear of nuclear war, used by Lyndon Johnson's team against his main rival Barry Goldwater.
4- Neil Armstrong was an American astronaut and the first person to walk on the moon in 1969. He was also the first person to walk on an alien celestial object.