Although containerization caused a revolution in the world of shipping, its introduction was not easy. Ports, railway (railroad in the US) companies, and shippers were concerned about the huge costs of developing the ports and railway infrastructure needed to handle container ships, and for the movement of containers on land by rail and road. Trade unions were concerned about massive job loss among port and dock workers at ports, as containers were sure to eliminate several manual jobs of cargo handling. It took ten years of legal battles before container ships would be pressed into international service. In 1966, a container liner service from the US to the Dutch city of Rotterdam commenced. Containerization changed not only the face of shipping, but it also revolutionized world trade. A container ship can be loaded and unloaded in a few hours compared to days in a traditional cargo vessel. This, besides cutting labor costs, has greatly reduced shipping times between ports; for example, it takes a few weeks instead of months for a consignment to be delivered from India to Europe and vice versa. It has resulted in less breakage due to less handling; also, there is less danger of cargo shifting during a voyage. As containers are sealed and only opened at the destination, theft has been greatly reduced.