carmendrahl writes: "Lethal injections are typically regarded as far more humane methods for execution compared to predecessors such as hanging and firing squads. But the truth about the procedure's humane-ness is unclear. Major medical associations have declared involvement of their member physicians in executions to be unethical, so that means that relatively inexperienced people administer the injections. Mounting supply challenges for the lethal drug cocktails involved are forcing execution teams to change procedures on the fly. This and other problems have contributed to recent crises in Oklahoma and Missouri. As a new story and interactive graphic explains, states are turning to a number of compound cocktails to get around the supply problems."