From the Washington Post:

"Since 9/11, DHS and TSA have made significant improvements to aviation security technology. We are driven by the ever-evolving threat environment to have adaptable, flexible technology that can address multiple threats," said DHS spokeswoman Amy Kudwa. "We are committed to working through the inherent challenges we face in deploying new technology that meets all of these needs, to ensure the safety and security of the traveling public."

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