Smoke rises amid buildings in Aleppo, Syria, Sept. 4. Even with just war theory as a guide, analysts say the answers remain murky to moral and ethical questions about whether a military strike is the appropriate response to what U.S. officials believe was a chemical weapons attack on Syrian civilians. (CNS photo/Ammar Abdulla, Reuters) (Sept. 6, 2013) See SYRIA-JUSTWAR Sept. 6. 2013.