I hope that zoo expansion isn't cancelled. That tragety is NOT the zoo's fault. I just love how people subject themselfs (and their kids!) to certain danger and think someone else is to blame for their demise. No, that does not make the structure unsafe or the zoo responsible. That makes you dumber than crap and a danger to yourself and others around you if you venture more than 10 feet from your dwelling...
In any event, would this increase the zoo's land coverage, which currently stands at 77 acres? Awesome if it does!
What's wrong with adding counties to the MSA or CSA? You do realize that would increase Pittsburgh's metropolitan population, and it could qualify for more federal $$$ for infrastructure, etc, right? That doesn't necessarily lead to sprawl. That's up to the various counties and municipalities and their land use/zoning ordinances and comp plans (if applicable)...