The killing of Osama bin Laden was an act of finality, but international debate about its legality and morality has just begun. The presidential order to kill the al Qaeda leader has raised questions about executive powers under the laws of war and produced a UN investigation. The intelligence work that led to bin Laden's hideout in Pakistan has raised other questions about "enhanced interrogation techniques." When can a president decide who lives and who dies? Should bin Laden have been captured and tried? Does discovery of his hideout justify torture? We hear different answers about law, morality, national security and the international reputation of the United States.