Pentagon's UFO Chief Testifies on Potential Threats to US.

The US government is tracking over 650 potential cases of UFOs, according to the director of the Pentagon's All-domain Anomaly Resolution Office. While there is no evidence of extraterrestrial life, some cases could be evidence of potential technological advancements from foreign countries like Russia and China. The office is helping the Pentagon and intelligence community to identify emerging foreign technologies, including the high-altitude surveillance balloon from China that flew over US airspace in February.