as a precaution, chicago stepping up security ahead of the chicago marathon. >> you take an event, whether it is boston, paris, or vegas, and you triple, double, check, everything you have done and asked some fundamental reviews. this will be going on until the runners started to lining up at the start line. >> police in boston confirm that investigators looking into paddock came across internet searches of the city's fenway park and nearby art center. both places have posted out day events recently. they are also aware of reports that paddock had been researching hotels surrounding fenway. >> the investigation is being led by the folks in las vegas and we are in constant conversation with the center here in massachusetts, which is in constant contact with them. >> police say paddock also rented rooms elsewhere on the strip at the ogden, we have been