New York CNN  —  Two recent plane crashes have stoked worries among flyers and prompted some to pull back on air travel plans, according to two of the airlines that had those crashes. Delta Air Lines CEO Ed Bastian said Tuesday morning that the fatal crash of an American Airlines flight on approach to Ronald Reagan Washington National Airport in January, as well as a non-fatal crash in which a Delta flight flipped upside down upon landing in Toronto last month, are likely at least partly behind