it terrifies you. >> and this was the second deadly accident at the dayton air show in the past decade. in 2007, another biplane hit the runway while doing loops. the air show will go on as planned today. it's a decision that could change the course of the george zimmerman murder trial. ahead of monday's opening statements, the judge ruled testimony from the state's two voice experts who analyze just who was screaming in the background of 911 calls cannot be used. in pretrial hearings, one witness testified that screams came from florida teen trayvon martin before he died. the other confirmed those screams were not zimmerman's. but defense attorney mark oameria says that was all junk science. >> we want the 911 call in. we just don't want it analyzed by people who don't know how to analyze it. this junk science could affect the jury. they will never see or hear anything about this. >> jurors will still hear the 911 calls and people familiar