Carolyn
My brother saw it. He says something streaked toward the plane, not the other way around.”
it’s amazing how so many have completely discounted the eyewitness accounts of those who saw it with their own eyes, for no motive other than political reasons.
And I don't doubt that your brother saw something. Hundreds of people saw something. The question is what, and given all the conflicts in witness testimony we may never know. This is the reason why any police officer will tell you that quite often the most useless evidence to any investigation is eye-witness testimony.
Has your brother speculated on where it streaked from? Would that not have been visible given the pretty intense illumination a missile streaking creates? Have any of the eyewitnesses said they saw where it came from?