Navy pilots who think they may have seen unidentified flying objects will now have a detailed means of reporting unexplainable events so the military can keep track of what may, or may not, be happening. The Navy is updating and formalizing the process by which reports of any such suspected incursions can be made to the cognizant authorities," they said in a statement. The Navy does not think that aliens have been flying in US airspace, one Navy official told CNN. But there have been "a number of reports of unauthorized and/or unidentified aircraft entering various military-controlled ranges and designated air space in recent years," according to the statement. "The Navy and the USAF ... investigates each and every report." The new policy will standardize how incidents are reported, and what radar or other data may be gathered that the military can store long term for further analysis. Separately a senior military official told CNN that some of the recent sightings are highly classified military aviation programs undergoing testing. Because the sightings have garnered public attention, senior Navy intelligence officials have briefed Congress, as well as aviators on the safety hazards. The Pentagon has intermittently over the decades funded various efforts to evaluate unexplained incursions and phenomena, but the last official effort was shuttered in 2012. A former Pentagon official, who led that program and resigned in protest when it was ended, told CNN's Erin Burnett in 2017 "that there is very compelling evidence that we may not be alone."