when the television channels only broadcasted till a few hours past midnight. Then they would say. "This is the end of our broadcast day." Then they would play the national anthem while showing video of a battleship sailing on the sea. Then some weird graphic would come on the screen, and that would be it for a few hours.

Fox is doing kind of a revival where they play the national anthem, even though they broadcast continuously 24/7. Their viewership tends to be older, so they are appealing to our nostalgia for the good old 50s. (Back when America didn't have any real problems, or so some tend to think.) (Sorry . . . didn't mean to politicize this.)