Hard to believe they couldn't just get a drummer to fill in. I personally know a few awesome drummers that could learn the material in a week haha. Either way that really sucks, I was stoked to see them.
That's a pretty big blow to the tour. Wonder if they're gonna find a last minute replacement. Glad I didn't get tickets though. (was on the fence. saw AM! recently enough and not really that into Bad Religion. Plus Luceo and Gaslight are both playing around the same time)