Agence France-Presse: The US government ordered certain ships working on the Gulf of Mexico oil spill back to port Thursday, amid fears that a brewing storm could force a mass evacuation and derail efforts to plug BP’s runaway well. A full-scale evacuation could delay by up to two weeks the final operation to plug BP’s runaway well, which has unleashed millions of barrels of crude on Gulf Coast shorelines in one of America’s worst ever environmental disasters. “Activities that are under way for …