Moral Implications of U.S. Anti-Terrorism Policies

As the U.S. builds coalitions and deploys troops in response to last month’s attacks, an old moral question has resurfaced: In order to fight a great evil, how much evil do you have to condone? For instance, in order to get the help of unsavory governments in the fight against terrorism, does the U.S. have to abandon its pressure on those same governments to recognize human rights?