Wow.

This statistic, if true, is amazing and gives you some hint how big is the United States.  

"It's so easy to get exotic animals in the US that there are more tigers in captivity here than there are in the wild throughout the world, according to Carson Barylak, who works on legislative issues for IFAW and heads their "Big Cats in Captivity" campaign. "

Link:  TechInsider.com "Armed Police Free Lions, Tigers & Bears".