In a statement, the US Department of Defence said before bringing down the balloon, the Biden administration took steps to protect against the collection of sensitive information, mitigating its intelligence value to the Chinese. US Secretary of Defense Lloyd Austin said the balloon was being used by China in an attempt to surveil strategic sites in the continental United States. He, however, did not say anything about whether Beijing was able to gather sensitive information from the country's military sites.
Today, NBC News reported that China was able to control the balloon so it could make multiple passes over some of the sites and transmit the information it collected back to Beijing in real-time. 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 report said citing two senior officials said.
According to the report, China could have gathered much more intelligence from sensitive sites if not for the Biden administration's efforts to move around potential targets and obscure the balloon's ability to pick up their electronic signals by stopping them from broadcasting or emitting signals.
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Beijing has said repeatedly that the balloon was an unmanned civilian airship that accidentally strayed off course. China's foreign ministry spokesperson Mao Ning said the balloon was civilian and was used for flight tests. "Affected by the weather and with limited self-steering capability, the airship deviated far from its planned course and entered into the airspace of Latin America," she said.
Responding to another question, the spokesperson said the unmanned airship was found to be "a civilian airship used for meteorological and other research purposes".
After the balloon was shot down, the US administration did say that it was capable of collecting signals intelligence. The balloon had a self-destruct mechanism that could have been activated remotely by China, but the officials said it was not clear if that didn't happen because the mechanism malfunctioned or because Beijing decided not to trigger it, the report said.
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