This blatant attack on a peaceful mission is not just a violation of international norms—it is a moral outrage. The flotilla was carrying activists and humanitarian aid destined for the besieged people of Gaza, who have been enduring a humanitarian catastrophe under Israel’s prolonged and suffocating blockade. The United States must take urgent and decisive action. The siege on Gaza must be broken, through global solidarity, humanitarian aid and political pressure. The United States must decide whether it stands with the oppressed or the oppressor.