according to the american cancer society, cancer is the second most common cause of death in the united states, exceeded only by heart disease. and it accounts for nearly one of every four deaths. here to talk about this new research dr. bob laheda, chairman of inned sick medicine and professor of medicine at rutgers medical school. the majority of cancers could be just random? actually, john, i don t agree with this at all. they re saying two-thirds of the cancers that we getting out of luck. that means that we have in our bodies these cells we call stem cells. stem cells can become any organ, brain, heart, lung, skin bone and they re saying an arrow that can occur by happenstance in one of our dna molecules, the genetic material in the cell can cause a cancer and doesn t depend on whether you spoke or eat fat whether you sit on a