Arms firms that provide core military components for drones deployed by the US to conduct covert strikes in violation of international law allegedly bought access to NATO’s summit in Wales last week, a British human rights charity says.

The defense companies concerned doled out up to £300,000 to ‘exhibit’ their military wares at the conference in Newport. Among the firms present were General Dynamics, Raytheon, Lockheed Martin and MBDA, according to a British government press release.