And he categorically denied that the objects—each roughly the size of a small car or SUV—had any connection to China, which set off a diplomatic firestorm after a 200-foot-tall spy balloon drifted across U.S. air space before being shot down off the South Carolina coast on February 4.
But what Biden didn't explain was what the objects were or who sent them. The administration has said that the government believed they were likely tied to private companies or research institutions.