FOR A NATION that almost never puts murderers to death — there were 14,196 homicides in 2013, but only 39 executions — Americans spend an awful lot of time debating whether and how to do it. The Utah legislature last week passed a bill reinstating the firing squad to execute death row inmates, as a back-up in case lethal-injection drugs aren't available. It was in Utah five years ago that the last death by firing squad in the United States took place, when Ronnie Lee Gardner paid with his life for the courthouse murder of attorney Michael Burdell in 1985....