The US and Israeli military attacks on Iran have put international law and the US Constitution under increasing pressure. The U.S. and Israeli forces were attacked by Iran, which then retaliated by firing missiles at targets across the Mideast. U.N. Secretary-General António Guterres stated that the airstrikes violated international law, including the UN Charter, and Iran's retaliatory attacks violated the sovereignty and territorial integrity of other nations in the region. The Trump administration defended the military campaign as a lawful measure to prevent Iran from developing nuclear weapons. Critics argue that the strikes are illegal as only Congress has the power to declare war. The International Criminal Court defines aggression as acts of aggression against a state that is not self-defense or an imminent threat of an attack.