Greece: Ethniki Amyna-Athens airport section of Attiko Metro Line 3 reopens September 1, 2009 | Europe News The section of Attiko Metro Line 3 between Ethniki Amyna and Athens airport has reopened for the public with a new station, Nomismatokopeio. This stretch of the line had been closed to allow construct... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password