What's the Kennection? #81

What 1964 movie was subtitled How I Learned to Stop Worrying and Love the Bomb?

People of what profession use the "Mendoza Line" as a threshold of incompetence?

In 1977, who was the first Star Wars character to say that they had "a bad feeling about this"?

What Betty Crocker dinner brand introduced its "Tuna" variety in 1972, "Chicken" in 1984, and "Pork" in 2003?

Who bought his famous Santa Barbara County ranch after visiting Paul McCartney there while shooting the "Say Say Say" video?

What's the "Kennection"?