Did 9/11 justify Afghan War

Marjorie Cohn, a well-known professor of international law, wrote in November 2001: “[T]he bombings of Afghanistan by the United States and the United Kingdom are illegal.”2 In 2008, Cohn repeated this argument in an article entitled “Afghanistan: The Other Illegal War.” The point of the title was that, although it was by then widely accepted that the war in Iraq was illegal, the war in Afghanistan, in spite of the fact that many Americans did not realize it, was equally illegal.3 Her argument was based on the following facts: