Among Dow components, American Express moved ahead 44 cents or 1.3% to $34.70 and Citigroup showed a slight gain to close at $50.22. Airlines recovered some ground lost in the wake of the scare of plastic explosives brought on board an aircraft in a passenger's shows at the weekend. AMR, parent of American Airlines, retrieved 38 cents or 1.8% to $21.57 and UAL, which owns United Airlines, rose 21 cents or 1.7% to $12.79.