Israel has a long track record of assassinating its enemies. Will it work against Hamas?

"'Whoever conducted this strike not only had reliable intelligence on the target but they had eyes on it ... they had dynamic collection that enabled them to follow Arouri as he moved in Beirut. This would be a remarkable achievement for any intelligence service,' said Roule, now a senior adviser to United Against Nuclear Iran, a nonprofit that says it focuses on threats posed by the Islamic Republic of Iran."