Development, use, and transfer of unmanned weapons systems : introduction / Stuart Casey-Maslen -- Legality of use of armed unmanned systems in law enforcement / Stuart Casey-Maslen -- Armed unmanned weapons systems under jus ad bellum / Stuart Casey-Maslen -- Armed drones and the law of armed conflict / Nathalie Weizmann -- Ensuring fully autonomous weapons systems comply with the rule of distinction in attack / Maziar Homayounnejad -- Unmanned weapons systems and the right to life / Stuart Casey-Maslen -- Corporate liability : an alternative path to accountability? / Hilary Stauffer -- Autonomous weapons systems and international criminal law / Stuart Casey-Maslen.