Come to think of it, there ARE tigers -- Bengal tigers, for instance -- in the US. They are found in zoos.
They are also found in places like Lion Country Safari. And they DO get lose.
Hmmmmmmmmm....
Mountain lions do a Great Good for the environment. Around here they're eating yippy little dogs, and in California I understand they're helping to keep the jogger population under control.
By the way, these are true lions, members of the same family as the ones in Africa.