Spain's extra security checks on vehicles entering Gibraltar has not only caused traffic tailbacks. They have also threatened to jam relations between Madrid and London once again.<br /><br />The Rock has long been a source of friction, as Spain continues to assert its claim to the British territory. <br /><br />Tensions are also being stoked by Madrid's plans for border fees and airspace controls. <br /><br />...<br />http://www.euronews.net/
