What's on show at controversial arms fair?

Arms manufacturers will gather in London this week to grease palms and prepare sales of controversial defence and security equipment.More than 1,600 exhibitors from 54 countries are attending the Defence and Security Equipment International (DSEI) at ExCeL.Defence Secretary Sir Michael Fallon and Liam Fox, Secretary of State for International Trade, will speak at the event alongside the chiefs of staff of the UK's armed forces.