From the Highlights: "We conducted this audit to determine whether the Transportation Security Administration (TSA) planned, implemented, and managed its Quiet Skies program to accomplish its mission as intended. The program uses enhanced screening procedures on higher risk passengers, and Federal Air Marshal Service (FAMS) officers observe these individuals at airports and during flights."
Department of Homeland Security, Office of Inspector General, Report No. OIG-21-11
Department of Homeland Security Office of Inspector General: https://www.oig.dhs.gov/