Here's one way to celebrate the national do-not-use-gas holiday known as Dump the Pump: announce long-term cancellations for 13% of your LAX flights and blame high fuel costs. That's what Delta is reported to be doing in a move that has somewhat become a trend. And with that comes higher prices and less options for travel. The cuts affect nonstop routes to Boston, Hartford, Conn., and Columbus, Ohio, Mexico and Florida. Meanwhile, United announced increased......