PARIS: A group in Yemen attempted to use Anthropic’s Claude chatbot to build guided rockets and missiles, the US firm has revealed, as Iran-backed Houthi rebels are on the offensive in the country. In a report published Thursday on how it had prevented illegal uses of Claude in several countries, Anthropic said it had “identified a cell of threat actors based in northern Yemen running three weapons development programs.” Those were “a guided rocket that used a commodity phone-class flight comput