From January 28 to February 4, 2023, a high-altitude balloon originating from China flew across North American airspace, including Alaska, western Canada, and the contiguous United States. On February 4, the U.S. Air Force shot down the balloon over U.S. territorial waters off the coast of South Carolina. Debris from the wreckage was recovered and sent to the FBI Laboratory in Quantico, Virginia, for analysis. Following a preliminary analysis of the debris in June, U.S. officials stated that the balloon carried intelligence-gathering equipment but does not appear to have sent information back to China. U.S. President Joe Biden described the balloon as carrying two railroad cars' equivalent of spy equipment, however stated that it was "not a major breach", and that he also believed that the Chinese leadership was not aware of the balloon. The U.S. government said the balloon had a propeller for maneuverability.

When the object was first spotted, the Pentagon characterized it as a surveillance balloon. The Chinese government maintained it was a civilian (mainly meteorological) airship that had been blown off course. According to U.S. officials, the balloon carried antennas and other equipment capable of geolocating communications signals, and similar balloons from China have flown over more than 40 nations. Analysts said that its flight path and structural characteristics were dissimilar from those of a typical weather balloon.