showing symptoms of carbon monoxide poisoning, including vomiting, headache and fatigue. officials say the building has a history of similar issues and is due to the demolished next summer. they did not have a carbon monoxide detotec detector. and david, authorities urge people to get a carbon monoxide detector like this one and make sure to get your heating systems, those gas fireplaces and water heaters, inspected every year. winter is the worst time of year for carbon monoxide deaths. david? a really important reminder. clayton, thank you. the fbi is now investigating the case of an american woman who plunged from an upper deck of the royal princess cruise ship and did not survive. she and her husband were on a seven-day crude out of ft. lauderdale, and abc s victor oquendo from florida tonight. reporter: tonight, the deepening mystery at sea. an american woman falling to her death aboard a princess cruise
wiant was in his freshman year at ohio, an honor student who played basketball and sang in the choir in high school. his family, understandably, devastated. david? david wright, thank you. now to the emergency playing out, at least 75 people were rushed to the hospital, most of them students. they d been sleeping, cadets, future officers, when there was a gas leak. authorities near des moines, iowa, fear what could have happened if a guard hadn t called for help. here s abc s clayton sandell now. reporter: tonight, first responders in training at the center of a real emergency. at about 5:54 this morning, our overnight security officer at the academy detected a very strong odor of what she describes as gas, and she called 911. reporter: inside, 86 police sleep in their dorms. evacuations begin immediately. they found high levels of carbon monoxide. reporter: many of the cadets