The new pilot program, which is scheduled to begin at Pittsburgh International Airport on September 5, will allow non-flying passengers to pass through security between 9am and 5pm Monday through Friday. You can't just casually saunter in, though. You'll need to flash a valid ID or passport at a designated kiosk and receive a "myPITpass," which you then bring with you through the security line and checkpoint (you'll still be subject to a full security screening as if you were actually catching a flight). Also, they'll pause handing out access passes depending on the level of gridlock in the security line.
According to Bloomberg, the program was pitched to the TSA by the airport, which considers itself a community hub packed with retailers and restaurants locals want to visit in spite of the fact that they're inside an airport. In fact, up until 9/11, the airport was apparently a hangout where non-passengers would regularly drop by for dinner. It does boast a number of better-than-average airport eateries, including one by celeb chef Michael Symon.