The Transportation Department is stepping up enforcement of persistent flight delays with a lawsuit against Southwest Airlines and a fine against Frontier Airlines.The agency said the U.S. District Court lawsuit it filed in California on Wednesday alleges that Southwest illegally operated chronically delayed flights and disrupted passengers' travel plans.

Yesterday, the United States and U.S. Department of Transportation (DOT) disclosed a lawsuit against Southwest Airlines, accusing the airline of chronically delayed flights and interrupting passengers’ travels.

In anticipation of the coming U.S. TikTok ban, which will go through on Sunday unless paused by the Supreme Court, users have been fleeing to other video platforms, including the Chinese app RedNote. The AT Protocol is a newer, open protocol designed for decentralized social media applications.