Lambert St. Louis International Airport is the newest airport to be awarded Transportation Security Administration approval as a gateway airport for corporate jet operators who want to fly to Ronald Reagan Washington National Airport (DCA). Lambert St. Louis began gateway operations on June 15, and the supporting FBO is Signature Flight Support, which also operates the sole FBO at Washington National. With the approval, Lambert became the first St. Louis-area airport and 21st gateway nationwide for a process that few business jet operators have chosen to endure.