Initially that is what I had heard resulted in Darrell's injury.
I had the opportunity to talk to Rob Geiger at the second Las Vegas race last year while having him sign a couple of copies of his Darrell Russell book. I was privileged enough to have a lengthy discussion about Darrell with Rob and we discussed many things including friendship, their families as well as that fateful day in St Louis.
I told Rob all of the theories that I had heard and asked him what was and wasn't true. Rob was very candid and answered any question I had. I didn't stick my nose in too deeply and tried to tread carefully as Rob and Darrell were so close, beside it's not my place to do so.
I don't mean to come across as one of the "from a good source" people that appear dime a dozen on here, but I don't feel it is my position to say what critically injured Darrell, but I would like to clarrify anything that I know isn't true, hence me stating that it wasn't the wing strut.