Employees work at the site where a train of Metro Public Transport System knocked down a wall and hung suspended in the final zone of the Rosario Workshop, in Mexico City, capital of Mexico, on Dec. 18, 2014. The Metro train carried out maneuvers in the final zone of the Rosario Workshop, not brake appropriately and knocked down a wall and was suspended, no injuring were reported, according to information from the Metro Public Transport System. (Xinhua/Str)