An American teenager has been detained on an Antarctic island, creating a major delay in his attempt to fly his small plane to every continent that is being followed online by more than a million people. Chilean authorities stopped Ethan Guo, 19, after he submitted a false flight plan, according to the BBC's US partner CBS News. His deviation from that plan in the air had "activated alert protocols", Chile's General Directorate of Civil Aeronautics said in a statement. Mr Guo was taken into custody after landing on King George Island, home to a number of international research stations and...