Rep. Mark Walker, R-N.C., told Fox News Friday that he is "concerned" about recent reports by U.S. Navy pilots of encounters with unidentified aircraft that some have speculated could be otherworldly.

"We are concerned about it," Walker, a member of the House Homeland Security Committee, said on "Tucker Carlson Tonight."  "As the ranking member of terrorism and counterintelligence, we have questions. It comes down to some of the new infrared radar systems that we're putting on some of our new jets are detecting some things out there."

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