The rise in the number of high-altitude objects recently identified flying in U.S. airspace is due in part to the government enhancing its radar systems, a top Pentagon official said on Sunday.
Melissa Dalton, assistant secretary of defense for Homeland Defense and Hemispheric Affairs, told reporters in a briefing on Sunday that officials have been closely scrutinizing U.S. airspace ever since the first Chinese surveillance balloon was shot down on Feb. 4 after making its way across the United States and approaching the Atlantic coast.
