RT News - September 14, 2014 (17:00 MSK)

The UK Prime Minister vows to crush the Islamic State after the jihadists behead a British aid worker - the third execution of a Western hostage in recent weeks; The U.S. and EU take aim at the Russian economy again, rolling out fresh sanctions that target its defense, energy and banking sectors - and accusing Moscow of destabilizing Ukraine; Despite a fragile ceasefire largely holding in the country, Kiev and local militia are now swapping prisoners in accordance with the peace plan; Hundreds of thousands flood the streets of Barcelona to celebrate Catalonia's National Day, as the Spanish province calls for a referendum on independence from Madrid.