In The Morality of Defensive Force, Quong defends a powerful account of the grounds and conditions under which an agent may justifiably inflict serious harm on another person. In this paper, I examine Quong’s account of the necessity constraint on permissible harming - the RESCUE account. I argue that RESCUE does not succeed. Section 2 describes RESCUE. Section 3 raises some worries about Quong’s conceptual construal of the right to be rescued and its attendant duties. Section 4 argues that RESCUE does not deliver the verdicts which Quong wants. In those sections, I assume that the attacker is culpable for the threat he poses. Section 5 considers cases where the attacker, though responsible for the wrongful threat he poses and therefore lia...