Whiteout Causes Massive Pile-Up Harrisburg, Pennsylvania — January 29, 2025 A sudden and intense snow squall is being blamed for a massive, multi-vehicle pile-up on Interstate 81 Wednesday afternoon, with the entire terrifying chain reaction captured on a motorist's dashcam. The video shows traffic navigating the slick highway in near-zero visibility when a white pickup truck ahead suddenly loses traction and slides sideways across the travel lanes. The driver with the dashcam brakes hard as an