Protests and strikes against unpopular pension reforms are again gripping France. Many thousands of demonstrators are marching Tuesday and the Eiffel Tower is closed. Police ramped up security amid government warnings that radical demonstrators intended “to destroy, to injure and to kill.” In Paris, striking workers invaded and blocked train tracks serving one of the French capital's main railway stations. Yet there was a sign that protests may be losing steam, with sanitation workers in Paris saying they would suspend their-week-long strike Wednesday because few strikers were left. Fears that violence could mar the demonstrations prompted the government to order deployment of 13,000 officers, the most so far. Read moreFrench police brace for protest violence; trash strike ends