US failed to detect previous Chinese spy balloons

US may have mistaken previous Chinese spy balloons as UFOs

The balloon was spotted Wednesday over Montana, home to Malmstrom Air Force Base, which has fields of nuclear missile silos.

How search for UFOs helped lead US government to Chinese spy balloons

U.S. intelligence review of UFOs played a role in detecting that China had a balloon surveillance program.

Previous Chinese spy balloons over US were classified as UFOs: report

Some previous detections of Chinese surveillance balloons in U.S. airspace were initially categorized as "unidentified aerial phenomena," according to a report in The New York Times.

Trump-era Chinese spy balloons went undetected

They may have been classified as UFOs, or unidentified anomalous phenomenon, at the time, reports say.

Pentagon says it had an 'awareness gap' that led to failure to detect 3 Chinese balloons under Trump

(CNN) -- The American military had a "domain awareness gap" that allowed three other suspected Chinese spy balloons to transit the continental United States undetected under the Trump administration, the Pentagon general responsible for providing air and missile defense over North America said on Monday.

US failed to detect past Chinese spy balloons, Air Force general says

A senior US general responsible for bringing down a Chinese spy balloon said on 6 February the military had not detected previous spy balloons before the one that appeared on 28 January over the United States.