With transatlantic ties strained, Saturday's keynote speech at the Munich Security Conference by US Secretary of State Marco Rubio was highly-anticipated. He struck a conciliatory yet critical tone of Europe while Ukraine's President Volodymyr Zelenksyy also took to the stage, calling Russian President Putin a "slave to war." But the EU's foreign policy chief is pushing back against the US's portrayal of Europe in decline - a day after Washington's top diplomat criticized the bloc's immigration