For the better part of a century, the machine most likely to kill an American has been the automobile. Car crashes killed 33,561 people in 2012, the most recent year for which data is available, according to the National Highway Traffic Safety Administration. Firearms killed 32,251 people in the United States in 2011, the most recent year for which the Centers for Disease Control has data. But this year gun deaths are expected to surpass car deaths. That's according to a Center for American Progress report, which cites CDC data that shows guns will kill more Americans under 25 than...