Facebook CEO Mark Zuckerberg

Updated at 6:28 p.m. ET

TikTok has filed a federal lawsuit against the Trump administration arguing that the president's executive order taking aim at the Chinese-owned app is unconstitutional and should be blocked from taking effect.

In 1963, 11-year-old Klaus Teuber received a gift that would change his life: a board game. "When I opened the box of the game, I liked the scent of the game," he remembers, inhaling deeply. "Ah, so wonderful! There is adventure in this box!"

It was a game of Romans versus Carthaginians. "It was a tabletop game with wonderful painted figures, and you had to role the dice to fight against the others," Teuber recalls.

Both Twitter and Facebook have removed a post shared by President Trump for breaking their rules against spreading coronavirus misinformation.

Twitter temporarily blocked the Trump election campaign account from tweeting until it removed a post with a video clip from a Fox News interview from Wednesday morning, in which the president urged schools to reopen, falsely claiming that children are "almost immune from this disease."

The CEO of TikTok, the popular app for sharing short-form videos, is attacking Facebook for planning the launch of a "copycat" product, accusing the social media giant of trying to smear TikTok and put it out of business in the U.S.