The Chinese spy balloon that flew across the U.S. was able to gather intelligence from several sensitive American military sites, despite the Biden administration's efforts to block it from doing so, according to two current senior U.S. officials and one former senior administration official.
The intelligence China collected was mostly from electronic signals, which can be picked up from weapons systems or include communications from base personnel, rather than images, the officials said.
Officials have not said which company, department or organization the balloon belonged to, despite several requests for comment by NBC News.
After the balloon was shot down in February, Biden administration officials said it was capable of collecting signals intelligence.
The balloon first entered U.S. airspace over Alaska on Jan. 28, according to the Biden administration, which said it was tracking it as it moved.