Mongabay: Last Saturday, an oil pipeline carrying tar sands oil from Canada ruptured in Mayflower, Arkansas spilling between 3,500-5,000 barrels of crude (at most 210,000 gallons) into neighborhood streets and lawns. Families from 22 homes have been evacuated while clean-up crews have scrambled to contain the spill. ExxonMobil, which runs the 65-year-old Pegasus pipeline, has stated it will pay for any damage, however critics say the oil spill is more evidence that the Obama Administration should turn down...