Rosalind Peterson, founder of California Skywatch, says there's no evidence that those trails in the sky are anything other than normal contrails, aircraft emissions. Transcript of that portion: “We have to stick with what we can prove. We have to stay away from opinions and beliefs. And if we go to sue someone, we have to have enough rock solid evidence that is so tight to make a case so that we don't lose the case, and that we have many many people, in other words experts in various fields, to testify
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