Environmental activists sprayed several of the ancient stones of Britain's iconic Stonehenge site with an orange substance Wednesday, demanding that the next U.K. government — set to be chosen in a national election on July 5 — "sign up to a legally binding treaty to phase out fossil fuels by 2030," the protest group Just Stop Oil said. A video released by the group showed two activists running toward the prehistoric stones of the UNESCO World Heritage Site with what looked like fire...