It was cautioned by the Socialist government that the European football tournament beginning in France on June 10 could face disruption if the government did not compromise. Demonstrators filled the streets as workers heeded the union's call to stop work at various facilities and set up roadblocks at ports and distribution centers. Prime Minister Manuel Valls maintained that the government would not retract the law and would dismantle blockades at refineries, with potential adjustments to the reforms. The CFDT union supported Valls' stance. The protests on Thursday, following months of demonstrations against labor reforms, were seen as a critical test of the opposition's strength led by CGT. The street protests were attended by many participants from a youth protest group known as Nuit Debout. Police were present to prevent any potential violence, as seen in previous rallies where many were injured and arrested. Union leaders, including CGT chief Philippe Martinez and FO leader Jean-Claude Mailly, expressed their willingness to disrupt the Euro 2016 football tournament in order to protest the government's labor law. Prime Minister Valls, however, remained firm in his stance, refusing to make any major changes to the contested law. The state train company SNCF reported that a majority of national, regional, and local rail services were operational, indicating that the railworkers' strikes were having less of an impact compared to the previous week when half of the trains were not running. Following police actions to clear blockades at refineries and fuel distribution centers, Prime Minister Valls stated that 20-30 percent of fuel stations were without fuel or low on certain types of fuel. Transport Minister Alain Vidalies mentioned that the situation was improving, with fuel deliveries from depots to gas stations increasing. The number of fuel stations experiencing shortages in the Loire-Atlantique department dropped from 140 on Wednesday to 83 on Thursday. French nuclear power capacity has been reduced by up to five gigawatts due to stoppages, which is slightly over six percent of the total production capacity in the country. Despite experts in the power industry believing that the strike at the nuclear plant is unlikely to cause major blackouts due to legal restrictions on strike actions and power imports from other countries, the strike typically results in higher operating costs for the EDF power utility. In addition, a strike by dockers at the southern port of Marseille has caused the number of ships waiting at sea to offload oil, gas, and chemicals to increase to 21 from the usual five, according to the port authority. A demonstration over pension reform in 2010 ended after police dispersed picketers at supply depots and railworkers faced pressure from stoppages affecting their paychecks. Total SA, a large oil company, reported that most of its fuel distribution depots are operational, but two out of five refineries in France are currently not working and two more are expected to stop in the near future. The CGT union is facing a more isolated fight this time, as the head of the CFDT union, Laurent Berger, who supports the proposed labor reform, expressed concern over the intense political and industrial atmosphere and called for a more peaceful approach.