After reading Wikipedia, I think Colorado would have been safer.
Unlike most sharks, bull sharks tolerate fresh water and can travel far up rivers. They have even been known to travel as far up as Indiana in the Ohio River and Illinois in the Mississippi River,
Fascinating. I guess we might as well go to the ocean in future.
Uhhhh, no one in his right mind swims in the Mississippi. Sheesh.
There was a well documented bull shark caught near Cairo, IL back in the 20's or 30's. Theoretically, the current lock system on the Mississippi would now make such a thing impossible, but they're here in Louisiana they still get pretty far up the Atchafalaya basin, and are known to frequent Lake Pontchartrain.
Last year, an 8-footer made its way up the Potomac...