USA have shot down four aliens this week this is quite big news isn't it?
President Joe Biden ordered another object - the fourth in total this month - to be downed on Sunday.
As it was traveling at 20,000ft (6,100m), it could have interfered with commercial air traffic, the US said.
A military commander said it could be a "gaseous type of balloon" or "some type of a propulsion system".
He added he could not rule out that the objects were extra-terrestrials.
The latest object - shot down over Lake Huron in Michigan near the Canadian border - has been described by defence officials as an unmanned "octagonal structure" with strings attached to it.
It was downed by a missile fired from an F-16 fighter jet at 14:42 local time (19:42 GMT).