Three more objects were shot down by the U.S. military over the weekend after officials said they posed a threat to civilian airspace.
The remarkable development came roughly one week after the U.S. shot down a Chinese surveillance balloon off the coast of South Carolina days after it was first reported to be hovering over the continental United States.
President Biden and Canadian Prime Minister Justin Trudeau on Saturday authorized the mission, and Biden ordered the U.S. military to send an F-22 fighter jet to take the object down in Canadian territory.
While U.S. officials have disclosed some information about the latest objects taken out of the sky, there are still major gaps in what even the government has learned about them and communicated publicly.
Here is what is known about the objects shot down over the weekend, and what is still unknown.
Hellbound and Down 