A new security screener that people can simply walk past may soon be coming to an airport near you. Last year, U.S. airports nationwide began adopting HEXWAVE—a commercialized walkthrough security screening system based on microwave imaging technology developed at MIT Lincoln Laboratory—to satisfy a new Transportation Security Administration (TSA) mandate for enhanced employee screening to detect metallic and nonmetallic threats.

Denver International Airport on Thursday announced travelers can now breeze through security with their shoes still on — no TSA PreCheck required. State of play: The policy change comes two days after Department of Homeland Security Secretary Kristi Noem announced the Transportation Security Administration was lifting the shoe removal requirement nationwide.

Homeland Security Secretary Kristi Noem announced Tuesday that the mandate for passengers to remove their shoes at screening is over.

For the first time in almost 20 years, travelers no longer have to take off their shoes during security screenings at certain U.S. airports.

TSA is currently hosting PreCheck mobile enrollment events near major U.S. military installations. Enrollment costs range from $77-$85, depending on the provider, with membership remaining valid for five years. Providers include CLEAR, IDEMIA and Telos.