it vaporizes, so you don t see any smoke. reporter: it is not just young adults who vaped. around 14% of high schoolers do, too, according to another recent survey. today s cdc data shows white, non-hispanic american vape more than latino, asian, or black youth theater and this week, the american heart association said that e-cigarettes with nicotine are associated with increases in blood pressure and heart rate, but more research is needed on long-term effects. morrin says his health issues started when he became addicted at 16 to e-cigarettes containing nicotine. while i did it, it felt fine, but in between, i would get nauseous. reporter: he also started experiencing seizures. i thought i was watching my son died. the effects of vaping on kids and adolescents is an addiction that could come about from the chronic exposure to nicotine. reporter: doctors like dr. panagis galiatsatos says it may cause a wide range of severe outcomes, but research is
vapor. the lng expands 600 times, as it vaporizes. wind carries the vast vapor cloud towards downtown boston. the cloud erupts in a fireball 1,000 feet high. a vast thermal radiation wave pulses through the city. this isn t fire but heat from the explosion, so hot that it ignites anything in its path. that circle identifies the region within which there would be harmful radiation to anyone on the shore. the gas would only burn for 15 minutes, but would be long enough to devastate the city. that s an enormous fire. we ve never seen anything like that. and i hope we never do. but as long as lng is shipped into harbors like boston, the threat remains all too real. trying to run this kind of