The Transportation Security Administration (TSA) has added three new gateway airports for general ­aviation flights headed for Washington’s Reagan National Airport (DCA). Screening under the DCA Access Standard Security Program (DASSP) will now take place at the Signature Flight Support FBOs at Newark Liberty (EWR), Louis Armstrong New Orleans International (MSY) and Jacksonville International (JAX) ­airports. TSA officials at these locations will screen ­aircraft crew and ­passengers and inspect luggage, and will require submission of ­passenger and crew manifests 24 hours before the flight.