An F-22 fighter jet of the U.S. Air Force shot down an unidentified cylindrical object over Canada on Saturday. This is the third incident involving a high-altitude object shot down by the U.S. military in just a week. Update: PM Trudeau confirms he ordered the take down of unidentified object that violated Canadian airspace. U.S. fighter jets stationed at the Joint Base Elmendorf-Richardson in Alaska tracked the object entering Canadian airspace. The object was traveling across the United States and Canada for almost a week.