 CUTS THAT CHANCE OF HEALTHY AGING BY ABOUT 12%. LIGHT EXERCISE LIKE CLEANING INCREASES IT BY 6%. DEBORAH RODRIGUEZ, CBS NEWS. AMERICANS ARE TRAVELING IN RECORD NUMBERS THIS SUMMER, BUT DELTA AIRLINES SAYS IT SAW SECOND QUARTER PROFIT DROP 29% DUE TO HIGHER COSTS AND DISCOUNTING OF BASE LEVEL FAIRS ACROSS THE INDUSTRY. THE AIRLINE IS ALSO PREDICTING A LOWER PROFIT THAN WALL STREET EXPECTS FOR THE THIRD QUARTER.