Every person who is wearing fake shoes ( shoes with propulsion device built in or fastened on) should be told before worlds and Olympics that if you use these fake shoes. Your PR or PB or World or Olympic record will not be acknowledged. It will be noted with asterisk. As should the density of the track that the race was ran on. It is funny how the world governing bodies and the fake USATF let this run rough shod. Stop the non sense. Just note exactly how the record was broken. Keep it real.