A leading Ukrainian presidential aide claimed this morning that the explosion which damaged a key bridge in Crimea may have been ordered by one of Vladimir Putin's warring commanders. The 12 mile crossing over the Kerch strait links Crimea to the Russian mainland and is a major artery for Putin's forces that control most of southern Ukraine's Kherson region and for the Russian naval port of Sevastopol. It was damaged in an explosion early Saturday morning which saw chunks of the bridge fall into the sea and a large fire break out. The incident prompted gleeful messages from Ukrainian officials...