Why do some U.S. airports have private security, but others use TSA?

"Exclusive Control: Private Security Firms Patrol 20 US Airports, Raising Safety Concerns. Despite the Transportation Security Administration's (TSA) stringent security protocols, a growing number of US airports are opting for private security companies to screen passengers and cargo. Approximately 20 airports across the country have contracted with private firms to ensure compliance with federal aviation safety standards, sparking concerns about the potential risks and inconsistencies in security measures. As the aviation industry continues to evolve, critics are questioning whether private security companies can match the TSA's level of expertise and accountability in protecting America's skies."

About 20 U.S. airports rely on private security companies rather than the Transportation Security Administration to ensure that passengers and cargo comply with federal aviation safety standards.