If you're flying Delta Air Lines this summer, you may want to pack your own snacks. Delta on Tuesday said it is cutting food and beverage service on shorter routes beginning May 19. The move is aimed at creating "a more consistent experience across our network," the airline said in a statement to CBS News.  Passengers on the airline's shorter flights — or those under 350 miles — will no longer receive any food and beverage service unless they are seated in first class, "which always receives