Yeah the unknowns are what make this tough. Alot of it depends on how many kv/m are dropped, a/m, what height it's exploded at, etc.. I just found the full report to the senate briefing, I'm going to post it. It's very interesting and should be considered to have the most up to date information. I guess in the end worst case scenario you end up with something similiar to lights out. Best case is more like cars survive, work, and minor electronics survive as well.