A member of German air carrier Lufthansa cabin crew union "UFO" holds a sign reading "out of order" as he takes part in a strike outside a Lufthansa office building at the Fraport airport in Frankfurt, September 4, 2012. Lufthansa passengers face widespread flight disruption after cabin crew representatives said they continue a series of strikes over pay and cost-cutting measures at Germany's largest airline. The UFO union, which represents around two-thirds of Lufthansa's 19,000 cabin crew, late on Thursday called on its members to strike on Tuesday in Frankfurt and Berlin. REUTERS/Kai Pfaffenbach (GERMANY - Tags: BUSINESS EMPLOYMENT CIVIL UNREST TRANSPORT) Published: Zář. 4, 2012, 12:42 odp.