A Paris commuter checks a Velib self-service public bicycle into a distribution point during a continuing transport strike against pension reforms in Paris November 20, 2007. French teachers, postal workers and other civil servants began a one-day strike on Tuesday, joining forces with protesting transport workers to challenge President Nicolas Sarkozy's plans to reform the economy. The nationwide protests over issues ranging from pension reform to the cost of living disrupted schools, trains, postal services and airports. They are the biggest threat to Sarkozy's planned reforms since he was elected president in May. REUTERS/Mal Langsdon (FRANCE)