An expert has laid out reasons why the Chinese spy balloon could invade U.S. airspace unchecked.
The Chinese balloon was first sighted above Montana, a state that houses intercontinental ballistic missile (ICBM) silos, earlier last week. A top Pentagon official said on Feb. 3 that the balloon flew at 60,000 feet (18,300 meters), had the ability to maneuver, and changed course at some point during its flight, although he didn’t specify when.