this year bringing their campaign of terror to the shores of alex ortiz, cbs news, cairo. glor: we ve long been told aspirin can help reduce heart disease. now a new study says long-term regular aspirin use can substantially cut the risk of some kinds of cancer. here now to explain is dr. heather yeo of new york presbyterian-weill cornelle medical center. doctor, good to see you. why was this study so significant? thanks, jeff. actually, the study is important because it s one of the first studies to study patients, 130,000 patients actually, for such a long period of time. they studied patients for over 32 years and showed that after taking a moderate amount of aspirin for a long period of time, patients had a significantly decreased risk of cancer. f glor: gastrointestinal and t colo-rectal cancers? correct. and in fact, for gi cancers, the risk goes down by 20%, and for colo-rectalef colo-rectal cancers, for