the guy has never been to dimock, nor does he ever plan on coming to dimock. >> reporter: enter the federalent. eight days ago, the e.p.a. made its first fresh water delivery to dimock after its analysis raised flags. >> our ultimate goal is for everybody to have clean water. that's all. >> reporter: now the e.p.a. will do its own investigation of the water. tony guida, cbs news, new york. >> the last american combat troops left iraq in december. and today, st. louis became the first city in the nation to welcome them home with a parade. about 600 veterans took place as thousands of people in the gateway city lined the route to cheer them on. still ahead, florida businessmen with different takes on the g.o.p. candidates. that story is next. we have access to great specialists, and our pediatrician gets all the information. everyone works as a team. and i only need to talk to one person about her care. we're more than 78,000 people looking out for 70 million americans. that's health in numbers. unitedhealthcare. helping strengthen our bones. caltrate delivers 1200 milligrams of calcium and 8

spans new york pennsylvania and ohio and just last year our chief correspondent christine took us to dimock pennsylvania small rural community were several residents signed up to allow houston based cabot oil to drill under their property for the natural resource coverage became obvious very quickly that hydraulic fracturing or fracking fracking scares me came at a high price. i could start getting sick early on. in the drilling process i think i think i think they started throwing up and. having you know it's sort of like a very bad intestinal bug our son broke out mark like open sores down his legs from from use no water here her daughter had big. big sores of eczema so what is going. on now the illness is a result of methane gas leaking into residents wells permanently contaminating their water supply and just to prove how methane is in their water just take a look at what happens when one resident took a match to a jug of water. a lot like a flavor a gal would like was here we were the closest like kind like that i think. now since the reports of contamination cabot has been banned from