BELEK, Turkey- German Chancellor Angela Merkel said on Sunday that the group of 20 leading economies (G20) stood united to face any militant threat. 'We here at the G20 summit are sending a strong message that we are stronger than any form of terrorism,' Merkel said at a G20 leaders' summit in Turkey, adding that the attacks in Paris were a predominant topic at the meeting. She added that strengthening Europe's external borders was crucial for Germany.