Facebook announced today that its "Safety Check" feature will be permanent in its app and on the desktop. The feature lets you check to see whether friends and family are safe following a crisis. TechCrunch reports: The change comes following new terrorist attacks, including one in Barcelona, where a vehicle was driven into a crowd, as well as the attack in Charlottesville, here in the U.S. According to Facebook, the dedicated button is gradually rolling out to users starting today, and will complete over the upcoming weeks. That means you may not see the option right away, but likely will soon. When Safety Check is accessed by way of the new button, you'll be able to view a feed of disasters, updates from friends who marked themselves as safe and offers of help. An "around the world" section will display where Safety Check has been recently enabled, too.