Elon Musk has unveiled a new “X” logo to replace Twitter’s famous blue bird as he follows through with a major rebranding of the social media platform he bought for $44 billion last year. The X started appearing at the top of the desktop version of Twitter on Monday, but the bird was still dominant across the smartphone app. At Twitter’s headquarters in San Francisco, meanwhile, workers were seen removing the iconic bird and logo Monday until police showed up and stopped them because they didn’t have the proper permits and didn’t tape off the sidewalk to keep pedestrians safe if anything fell.