The Food and Drug Administration, which has long maintained that it has nothing to do with drugs used in executions, has quietly helped Arizona and California obtain a scarce type of anesthetic so the states could continue putting inmates to death. The shortage of sodium thiopental has disrupted executions around the country. But newly released documents show the FDA helped import it from Britain. Most state prison systems use sodium thiopental to put inmates to sleep before administering pancuronium bromide, a paralyzing agent, and potassium chloride, which stops the heart. But the drug has been in short supply since last...