Chinese balloon and mystery objects raise question of who controls ‘near space’
Nations govern airspace up to 60,000 feet, but above that no international agreement exists
The U.S. says the suspected Chinese spy balloon shot down Feb. 4 violated sovereign U.S. airspace. But when it crossed the U.S. at altitudes as high as 65,000 feet, the balloon floated into the murky zone aloft where no international consensus exists about which, if any, nation wields control.