Visitors look at ammunition on display at the Defence and Security Equipment International trade show in London, Britain, September 12, 2017. REUTERS/Hannah McKay Acquire Licensing Rights LONDON, Sept 15 (Reuters) - As Russia's Vladimir Putin and North Korean leader Kim Jong-un met this week to discuss what analysts believe will be a deal for an exchange of weapons, the West's leading companies were descending on Europe's biggest arms show in London. Since the last iteration of the biennial Defence and Security Equipment International (DSEI) in September 2021, Russia's invasion of Ukraine and dramatically increased tensions over Taiwan and North Korea...