As many as four of every 10 prisoners put to death in the United States might receive inadequate anesthesia, causing them to remain conscious and experience blistering pain during a lethal injection. Researchers in Florida and Virginia drew this conclusion after reviewing levels of anesthetic in the blood of 49 inmates after they were executed. "I approached this as a physician," said the study's lead author, Dr. Leonidas Koniaris, chairman of surgical oncology at the University of Miami. "We were asking: Is there a possibility of awareness during an execution? Is there a large degree of pain and suffering associated...