Greece said on Friday it had completed a 40km fence on its border with Turkey and a new surveillance system was in place to stop possible asylum seekers from trying to reach Europe following the Taliban’s takeover of Afghanistan.Events in Afghanistan have fuelled fears in the European Union of a repeat of the 2015 refugee crisis, when nearly a million people fleeing war and poverty in the Middle East and beyond crossed to Greece from Turkey before travelling north to wealthier states.Greece was…