Shocking surveillance footage shows police standing in hallways—with one officer even taking a moment to put on hand sanitizer—as the Uvalde, TX, school shooting continued for more than an hourbr br (warning: distressing themes)br » Sign up for our newsletter KnowThis to get the biggest stories of the day delivered straight to your inbox: » Subscribe to NowThis: br For more U.S. news, subscribe to NowThis News.