The views in this article are those of the author and do not necessarily reflect those of the ICRC. This response is based, in part, on Jean-Marie Henckaerts, ‘‘Customary international humanitarian law: a rejoinder to Judge Aldrich’’, British Year Book of International Law, 2005, Vol. 76 (2006), pp. 525–32; Jean-Marie Henckaerts, ‘‘The ICRC Customary International Humanitarian Law Study: A rejoinder to Professor Dinstein’’, Israel Yearbook on Human Rights, Vol. 37 (2007, pp. 259–270); and ‘‘ICRC’s Jean-Marie Henckaerts responds to my comments on ICRC Customary Law Study’’, Kenneth Anderson’s Law of War and Just War Theory Blog, 24 January 2006.