A commuter walks next to immobilized taxis during a protest near the Athens International airport, July 18, 2011. Greek taxi drivers blocked roads to Athens' airport and main harbour on Monday, holding up thousands of tourists at the start of a two-day protest against plans to liberalise their trade. REUTERS/John Kolesidis (GREECE - Tags: CIVIL UNREST POLITICS BUSINESS TRANSPORT IMAGES OF THE DAY)