and additional support from millicent bell through the millicent and eugene bell foundation. corporate funding for frontline is provided by... >> whether it's discovering an aspirin a day can prevent heart attacks worldwide, or creating cells that regenerate new heart muscle, our goal is developing treatments that save lives. brigham and women's hospital. >> sebastian rotella: it was july 2009. a man from america had come here to copenhagen on business. but first, some sightseeing. >> first of all, he rents a bike, an ordinary bicycle. and he has his video camera, and he rides with one hand on the handle and holding the video camera, riding around and taking pictures. you know, it's such an unusual scene of someone biking along with a camera. >> this is the famous concert hall built in 1748. >> rotella: these are his actual recordings as he narrated the images along the way. >> rotella: he might have been playing the part of a tourist, but his true intent was to case the city and this newspaper. jyllands-posten. four years before, it had caused outrage across the muslim world