Tensions between Denmark and Russia were ratcheted up a notch on Saturday.  Russia’s ambassador to Denmark, Mikhail Vanin, wrote in an opinion piece published by Jyllands-Posten that Denmark has made itself a target of a potential nuclear attack by joining Nato’s missile defence system.    “I don’t think the Danes fully understand the consequences of what will happen if Denmark joins the American-controlled missile defence. If it happens, Danish war ships will become targets for Russian atomic m