According to a report just published by the Swedish research institute the 'Stockholm International Peace Research Institute' (SIPRI), container shipping is regularly used to channel weapons by Iran and other countries embargoed by the United Nations, as well as 'non-state actors' . The report found that states such as Iran and North Korea have learnt from the methods used by drug smugglers to move large quantities of illegal cargo at low cost and with a fairly low chance of being caught. SIPRI identifies ports as being the key "choke points" where containers can be monitored for illegal cargoes. As SIPRI itself tacitly admits, proposals to screen containers for illegal cargoes simply do not take into account the sheer scale and speed of container movements at major ports. What might possibly offer a more viable way forward is to utilise supply chain visibility systems in order to improve the flow of information on the nature of cargoes.