The Outlook chapter presents the achievements and challenges of what we can now call international counterterrorism law. Outside the context of armed conflict, sectoral treaties govern international terrorism involving a range of tactics and targets, notably hostage-taking, bombings, hijackings, and nuclear terrorism as well as attacks on foreign diplomats and, under a treaty approaching universality, the financing of international terrorism. But the distinction with terrorism in a situation of armed conflict in these treaties should have been drawn far more sharply. Under international humanitarian law, the definitions of terrorism in armed conflict are clear.