(Ars Technica) The Department of Homeland Security has been pushing a plan that if enacted would require all Americans submit to a facial-recognition scan when departing the country. This step would be a way to expand a 2004 biometric-tracking law meant to target foreigners.

According to the Associated Press, which first reported the plan on Wednesday, facial-scanning pilot programs are already underway at six American airports—Boston, Chicago, Houston, Atlanta, New York City, and Washington DC. More are set to expand next year.

In a recent privacy assessment, DHS noted that the “only way for an individual to ensure he or she is not subject to collection of biometric information when traveling internationally is to refrain from traveling.”

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