borland has found itself caught in a global hunt for natural resources. the region around the city is rich in undergrounund gas and energy companies want to drill for it. to do so that have to use a controversiaial method knonown a hydraulic fracturing. in the u u.s., thisis has been linknked to a host of social an mental problems. these polish communities have heard the horror stories and don't want this in their babackyard. the industryry disputes such consent. >> we e allow themem to go o ank fofor us. we allow them to speak based on misinformation. >> this is growiwing globally, into the u.s.,., into europe, ,d the world beyond.d. some countries have imposed a moratorium. others, including poland, have in place to it with over 100 concessions awarded. with overbraced it,t, 100 concessions at. this is an organic farmer. his farm s sits on a gas hot sp. he is worried about the impact on water sources in ee regioion, rticularly of chemicals usedd in these processsses leak. hehe believes other fororms of pollutioion may follow. some do except t that polan

former san francisco 49ers chris borland. >> i didn't want to go down a route where for years i was doing something that could be detrimental to my health. >> reporter: the n.f.l. says it is taking steps to improve the safety of its players. is it doing enough? >> the n.f.l. is certainly taking steps to safeguard the health of its players, but the multibillion-dollar question is how do you get around the fact that this is a collision sport and hits to the head are a natural part of the game? >> reporter: in an email to cbs news, the n.f.l. said: the n.f.l. called the findings in this week's study important and told cbs news it's raising awareness about concussions. but, elaine, it add there are still many unanswered questions about the long-term effects of head trauma. >> quijano: roxana saberi, thanks. coming up, an update on the deadly accident at the ohio state fair and we'll hear from one of the survivors. and i live with non-24, a circadian rhythm disorder that can throw my days and nights out of sync, keeping me from the people, places, and things i love. the people i love have alwa

they literally got a lot of young americans killed because general was borland denied -- general westmoreland denied the city was taken. he continued to deny for nearly the whole time the battle was fought. would neverence concede the sheer number of enemy forces in the city. small units of marines and troopers were being ordered to attack positions that were held by overwhelmingly superior enemy forces in entrenched additions. >> tonight at 8:00 eastern on c-span's q&a. c-span, where history unfolds daily. in 1979, c-span was created as a public service by america's cable television companies and is brought to you today by your cable and satellite provider. susan: our guest on "newsmakers" is congressman john yarmouth. democrat of kentucky. the only democrat in kentucky's delegation. he represents louisville in the house of representatives and he is the top democrat in the house budget committee. we have lots to talk to him about on this busy week. our two reporters, alan reppeport, economic policy reporter for the new york times and david wiegel who covers politics for the washington post.