The international community is attempting to repair the lack of an organization to check the enforcement of mass destruction weapons (biological, chemical and nuclear) interdiction norms. But this endeavor is blocked by the American refusal of a reinforcement protocol to the Biological Convention in 1972 : since they are under the pressure of the pharmaceutical industry, the United States question transparency visits and the declaration of bio-defense installations, as well as inspection procedures when violation is suspected. During the Convention study conference, in November 2001, the United States have declared they did not want any more negotiations, nor any group of experts charged with identifying measures to reinforce the Convention. The conference was finally suspended for a year ; but unless exceptional circumstances occur, the United States are not likely to revise their position for November 2002. – Summary AFRI-2002