A report published by Mutual UFO Network (MUFON) on 10 July, 2016 tells us that NORAD dispatched two CF-18 fighter jets to the skies over Ottawa after a drone was spotted flying near the airport of the nation's capital last month. This incident took place on 25 May, 2016 at 5:45 pm.

The report tells us that the CF-18s were dispatched from Canadian Forces Base Bagotville in Quebec.It also tells us why these fighter jets were dispatched.

“The CF-18s were scrambled from Canadian Forces Base Bagotville in Quebec at about 5:45 p.m. ET on May 25, after commercial airline operators raised concerns about a ‘suspicious’ unmanned aerial vehicle seen near the Ottawa airport, according to a Department of National Defence spokesperson.”

It tells us about the people who spotted the UFO.

“The drone was spotted by the pilots of WestJet Flight 366, from Toronto to Ottawa, as well as Air Canada Flight 458, also from Toronto to Ottawa.”

The report further tells us that the pilots flew past the UFO.

“The WestJet pilots flew past the drone as the Boeing 737 plane was descending into the Ottawa airport at about 4:45 p.m. ET.”

It then tells us that call to the airport's air traffic controller was recorded by a website.

The pilot's call to the airport's air traffic controller was recorded by the website liveATC.net, which monitors air traffic control communications across the globe.

The report was submitted to MUFON by Dave Palachik, Chief Investigator Canada on behalf of the Canadian Media reports.

The above quotes were edited for clarity.

UFOs and alien flying saucers have been sighted by pilots around the globe. Such sightings often trigger a panic reaction and hence the air force gets involve as these UFOs may pose a threat to the security of a county.