The downing of the balloon on 4 February has been followed by a further three unidentified objects being shot down over North American airspace.
The US says it has recovered key sensors from the suspected Chinese spy balloon it shot down as tensions between the countries escalated.
The Chinese balloon, which Beijing denies was a government spy vessel, spent a week flying over the US and Canada before President Joe Biden ordered it to be shot down off the South Carolina coast.
The US military’s northern command said in a statement: „Crews have been able to recover significant debris from the site, including all of the priority sensor and electronics pieces identified as well as large sections of the structure.“
The downing of the balloon on 4 February has been followed by a further three unidentified objects being shot down over North American airspace.
The US has admitted that much about the most recent, unmanned objects remains unknown, including how they stay aloft, who built them and whether they may have been collecting intelligence.
The White House says it has determined that China has a „high-altitude balloon programme“ for intelligence gathering.
