German company conducts trial run for high-speed rail service which could replace airlines across Europe.
Police in Italy have clashed with demonstrators, who have been protesting against plans to build a high-speed rail network.
Dozens of people were hurt in the scuffles, which took place in the small Alpine town of Chiomonte.
Police used tear gas to disperse protesters, who oppose the train link because it would cut right through the valley. They say it is a waste of public funds, and that it will result in environmental degradation.
Claudio Lavanga reports from Chiomonte.