Aerial photo: The Parkway crowd

Center City seemed pretty empty Saturday -- but not the Benjamin Franklin Parkway from above.

Lt. David Bonk, of the Philadelphia Police Department's aviation unit, tweeted a photo that showed the crowd at the Parkway for the Festival of Families:

Most air traffic is banned above papal events (law enforcement is one exception, along with military and regular commercial flights), so Bonk's photo is one of the few aerial images of the Parkway.

He's also shared photos from above of the crowds at Independence Mall during Pope Francis' address there.