Sky Orbs Check Out the Empire State Building

Photo date: September 4, 2015. Photographer: Mark Mahin.

In the photo below we see some orbs floating near the top of the Empire State Building in New York City.  One of the orbs is big and blue.  Is this one the leader of the "inspection team"?

There was no fog, mist, rain, or precipitation on this night. The air quality listed on airnow.gov was "good," with a rating of 35.