“Last week, the global drug company Pfizer announced sweeping new restrictions on the distribution of seven of its products, preventing them from being used to carry out the death penalty. Pfizer came into possession of those products, which include sedatives, paralytics, a pain medication, and a drug used to prevent or treat low levels of potassium in the blood, when it acquired the pharmaceutical company Hospira, in September. Its decision is an enormously significant one for the death penalty in the United States, and ends a long and chaotic chapter in which governments, drug companies, and activists worldwide have gradually closed the open market for the federally approved drugs that have been used for lethal injections.”