Read More...LE HAVRE, France (AP) — With union activists disrupting fuel supplies, trains and nuclear plants, French Prime Minister Manuel Valls opened the door Thursday to possible changes in a labor bill that has sparked intensifying strikes and protests — but insisted the government will not abandon it. The reform, aimed at boosting hiring by loosening protection for French workers, has escalated into the toughest challenge yet to President Francois Hollande and his Socialist government. “There could be improvements and modifications” in the bill, Valls said on BFM television Thursday.