The United Nations Charter prohibits threats or the use of force against the territorial integrity or political independence of another state, except in two cases. First, the UN can authorize collective security measures to protect people. This occurred after Iraq invaded Kuwait in 1990. The UN Security Council passed a resolution giving member states legal authority to use force to help Kuwait.  Second is self defence, which George W. Bush invoked after the 9/11 attacks in 2001 to justify the