UFO Sighting in Tempe, Arizona on April 3rd 2015 – I remember taking a picture and leaving, nothing unusual

I was out riding my bike going west on Curry from 68th St towards Mill Ave. I decided to take a picture of the Tempe Town Lake with the lights and buildings in the background. I took a few pictures of the surrounding area and went on my way. I edited some of the pictures but never used them for anything artistic and they have been on my harddrive eversince. The other day, I was looking through a folder in my computer that I labeled "Landscapes" and looked some other landscapes that I took photos of. When I brought up this photo, I noticed some small white dots on the photo so I then zoomed in. I thought, "wow", this has lights like ufo photos lol. I really don't know what it is but it is very interesting. There is an airport near by so maybe it's just something from there but I thought I would send it in anyway. Thanks