Here’s a capital question for you . . .

I borrowed this from the Addicted to Research blog, but don’t rush over there to discover the answer just yet. Please read the question and leave your answer as a comment. In addition, please explain why the one you have singled out is different from the others. Thanks.

The largest amount of capital punishment are done in China, Iran, Saudi Arabia, and the US. One of these isn’t like the others.