Let me start off by saying I have clear video of this sighting. I was at my radio control flying sight. I was flying my remote control B-17 and videoing the flight with my Mobius Action Cam (1080P). At the time there was two other guy' flying planes, one to my left and one to my right. No one including my saw anything out of the ordinary while we was flying. It wasn't until I got home and was viewing the flight footage that I saw the UFO streak across the sky. It came from behind us and traveled a straight path right across the flying field. It was silent and fast. I'm uploading the video..at mark 5:35 the ufo appears and streaks across the sky. I need to let u know I have video editing software for the purpose of making flight video's of my rc airplanes..I'm attaching the original video and a close up edited version I shared with my buddies on facebook