Senate Intelligence Chairman Marco Rubio just took a giant step towards government disclosure on unidentified flying objects — or what the government refers to as “unidentified aerial phenomena.”

Most UFOs turn out to be balloons, weather phenomena etc. But since at least the Second World War, some UFOs have been recorded by U.S. military sensors and witnesses that are not so easily explained. The government has held information about such UFOs closely in its possession since the 1940s.