“It’s important to remember that, under SPP, we still have TSA leadership and inspectors overseeing the security screening,” says San Francisco International's public information officer Doug Yakel. “It’s the front-line employees staffing the checkpoints that are contracted by the TSA to a private vendor. As an airport, we continue to work directly with the TSA, not their contract vendor.” For what affects screening performance, it's more a matter of extra manpower than different procedure. Airports can hire more private screeners or pay the security company less, or both. The ability to do exactly what the TSA does, only faster and cheaper, seems to be the major draw.