Date of sighting: June 22, 2011
Location of sighting: Denver, Colorado, USA

Eyewitness states:

"These "Donut UFO's are semi-transparent, I have recorded a very similar thing last year, these things have either scales that reflect light or have some sort of light polarizing effect that makes them TRANSPARENT, as these things fly they will reflect light at reflective angles and when the light is straight down they will be invisible, and then they are very difficult to find and record !!! . These things are in various sizes and speed models. I have filmed one that was very large, and I lost it because it became invisible, These round objects are very, very fast, and also transparent at a shifting angles.