The Transportation Security Administration is quietly sunsetting a common security checkpoint procedure at some airports. Is your airport on the list?

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.

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.