in 1989 the magma sent a hot sering spike within two miles of the surface.hat's when the trees started dying. >> this material loses gas as it gets closer to the surface of the ground and the primary gas is carbon dioxide. >> reporter: scientists have measured concentrations of carbon dioxides in the soil here about 30%. when they find such a high level of carbon dioxide that's what kills the tree. odorless and colorless carbon dioxide poses little health danger to tourists in the open breezes here. however if it collects in a cabin or tent, c02 can be dangerous. as rictor found out when he took re -- refuge in this cabin. >> and i had some what of a difficult time getting out of the cabin. >> reporter: the forest service closed this campground but after concluding the health danger as insignificant will reopen it next summer. but the under ground activity does raise the question, is mammoth about to erupt again. >> we could have an eruption here in a year or two or it could be thousands of years before anything ever happens. >> it doesn't bother us, we live

magma. my face. >> he'll have a story to tell now. >>> we're going to go to the top developing stories and amy robach. >> good morning, everyone. we begin with the chaotic scene at a dance concert overnight in boston. dozens of people becoming violently ill at a packed concert by d.j. avicii. 22 of them had to be put on stretchers and hospitalized. oppressive heat, alcohol and the dangerous club drug, molly. >>> officials are telling us more about the final moments of malaysia airlines 370. it was an automatic pilot before it ran out of gas. and when it ran out of gas, one engine failed before the other. crews have shifted the search area to the south. >>> this morning, millions of americans are in the path of severe flooding. the mississippi river ready to crest later today in minnesota, and one of the highest flood records on record. one town is submerged. many others cut off from the rising waters. >>> and tense moments for rob lowe and his family. they were on vacation in france when the

magma.y face. >> he'll have a story to tell now. >> yes, he will. >>> we're going to go to the top developing stories and amy robach. >> good morning, everyone. we begin with breaking news from the supreme court, a defeat for the white house. moments ago, the justices issued a decision that limits the power the president has to make temporary appointments to government jobs. the court ruled president obama exceeded his authority when he filled positions on the labor board while congress was not officially in recess. >>> and the justices ruling unanimously that a so-called buffer zone required outside abortion clinics in massachusetts violates protesters' free speech rights. the 35-foot buffer zones were aimed at protecting patients. >>> punishment has been handed down to the world cup soccer player caught biting his opponent this week. luis suarez will miss the rest of the world cup and will be banned from soccer if for the next four months. he's also being fined more than $100,000. >>> torr