At least 75 vehicles were ensnared in a massive, chain-reaction pileup on a Colorado highway Tuesday, authorities said. The crashes unfolded in the Rocky Mountains west of Denver, specifically near Loveland Ski Area, and followed a chaotic morning that saw six separate wrecks, mostly along the same highway, according to the Clear Creek County Sheriff's Office. Officials said the latest crash forced a two-way lane shutdown on Interstate 70, as photos released by the authorities showed emergency crews assisting drivers at the scene. "The closure is due to a severe multi-vehicle crash on the east side of Eisenhower-Johnson Memorial Tunnel...