you know, when it s summer, it means that there s tropical fruit that is abundant right now. what packs the most nutritional punch, though? cnn reporter jacqueline howard takes a look at today s fruit as fuel. tropical fruit is not only a great summer treat but loaded with anti-oxidants. take mangos, they re a powerhouse with vitamin c and a and other anti-oxidants. papayas are full of carotene, packed with nutrients and anti-oxidants. pineapple is chockful of vitamin c and may help with digestion. and the acai berry has been a tapele for amazon prescribes for centuries. it s packed with vitamins,