A host of countries around the world still impose the ultimate punishment on the most serious criminals - death. What is it like to be in command of the machinery of state-sanctioned execution? Hardtalk gets a rare insight from Allen Ault, who spent years running the corrections system in the southern US state of Georgia. He organised the killing of criminals until he could stand it no more. Now he is an opponent of the death penalty. Stephen Sackur finds out why.

(Photo: Allen Ault)