February: US downs another object off northern Alaska which officials said lacked any system of propulsion or control 11 February: An Ameri

February: US downs another object off northern Alaska which officials said lacked any system of propulsion or control 11 February: An American fighter jet shoots down a "high-altitude airborne object" over Canada's Yukon territory, about 100 miles (160 km) from the US border. It was described as cylindrical and smaller than the first balloon ไทเกอร์777