Thousands of Uber and Lyft drivers took part in a strike on Wednesday demanding better pay and working conditions in what organizers say was the largest ride-share strike in U.S. history. Delivery workers from DoorDash also took part. The Valentine’s Day strike came on the same day that Uber’s stock price jumped to a new high after the company announced it would buy back up to $7 billion worth of company shares in a move that will benefit shareholders.

In other labor news, flight attendants picketed at 30 airports Tuesday in a national day of action demanding higher wages and a new contract.