Police intervene after striking French taxi drivers threw dirt on the wind screen of a taxi carrying passengers on the motorway near the Roissy Airport north of Paris, February 6, 2008. The National Taxi Owners' Federation is fighting against a scheme to solve the country's chronic shortage of taxis by the abolition of tight quotas and the authorisation of minicabs. ++ EDITORS NOTE THAT FRENCH LAW REQUIRES THAT FACES OF LAW ENFORCEMENT OFFICERS ARE MASKED IN PUBLICATIONS WITHIN FRANCE ++ REUTERS/Antoine Gyori (FRANCE)