Soundless UFO Recorded in Linköping Sweden - Feb 8, 2013

A soundless UFO recorded in Linköping Sweden on February 8, 2013. 

According the witness: "This one did not make any sound at all and it has a red light on the back.

I checked flightradar24 and it showed no air traffic at all over my area.

So my conclusion is UFO or some kind of Military aircraft".