This World - Lethal Solution

International investigative documentary series. The eighth amendment of the US Constitution bans 'cruel and unusual' punishment - so should American prisons commit execution by lethal injection? The Supreme Court is now considering this extraordinary question. Reporter Vivian White meets the family of a man whose execution lasted 34 minutes, men on death row, a former prison warden present at 89 lethal injections and the doctor who invented the system.