Wall Street Journal: Facebook has begun testing a new feature that let users check in on live events from their couches at home. The company is offering a stream of content from the Lollapalooza music festival in Chicago to users anywhere in the U.S., an effort to compete with live social platforms like Snapchat and Twitter. It combines public content, such as photos from the stage and updates from performers like the Cold War Kids and Kaskade, with posts and photos from friends attending the festival.