Ground crews de-ice an American Airlines jet at DFW on Saturday Jan. 24. (Photo by Ron Jenkins)Getty ImagesAmerican Airlines reported a slim fourth quarter profit despite a $325 million cost for the government shutdown, and promised a brighter future despite poor January weather conditions.. Speaking to Phil LeBeau on CNBC on Tuesday morning, American CEO Robert Isom CNBC said that as a result of Winter Storm Fern, “It’s a skating rink at DFW,” the carrier’s largest hub. “I apologize to our customers,” he s ...