I saw the video about this on youtube, it is still a mystery or may be some group of people know what exactly happened, whatever many be the circumstances, the fact remains that around 09-11 people had died with unknown cause, moreover some of them had their eyes, tongue, and other body parts removed with some unknown equipment (very precise as surgery), their tents were torn from inside-out. I want to know after this horrible incident, whether they allowed further expedition for enthusiast and educators.