InsideClimate: A rash of explosive accidents involving oil-bearing trains has led to a surprising number of headlines and high-profile comments directly linking the fiery derailments to the fate of the long-stalled Keystone XL oil pipeline, the controversial project that would carry heavy bitumen from Canadas oil sands to Texas refineries. "North Dakota train fire adds fuel to Keystone XL debate," said a Bloomberg News headline. The Los Angeles Times published [3] "Canada rail crash stirs debate over Keystone...