There are no identifying marks on the craft. Also the second cam in the upper left corner caught nothing at all. It was invisible to that cam! That sound like the cloaking technology of aliens to me. So I'm calling this a real UFO.
Witness states: "I was fishing with two friends at the hudson river in the adirondacks. we thought we were alone, but suddenly there was a large crowd of people in rafts coming down the river as well as a pedal-driven train tour along the railroad tracks. my friend took a picture of the crowd. we did not see anything unusual at the time, but on looking at one of the pictures later, there is a very strange image in the upper right hand corner. it appears to show a possible ring-shaped object flying over the bridge, with a jet trail or something behind it."