The word "capital" in "capital punishment" connotes to a human being's head. In the retrospect, criminals were usually executed by chopping their head from the body. In the U.S, criminals awarded with death penalty are executed by lethal injection. Interestingly, the United States is among a very few western industrialized countries, which persists on executing the criminals. Moreover, it is among a few countries which execute psychologically ill criminals, people with very low IQ, and juvenile criminals. Unexpectedly, a large number of American adults along with ...