climate scientist michael mann on how a changing climate may affect our future. >> sometimes you'll hear from the critics. they'll say, "we demand proof that humans are causing this." and my response is that proof is reserved for alcoholic beverages and mathematical theorems." it doesn't characterize how science works. science works through weights of evidence, through likelihoods, through confidence levels, and so we're about as certain that humans are causing global warming as we are about any scientific proposition, but we never say we've proven something in science because there's always the outside chance that we could discover some new piece of information that would change our perspective. it's absolutely true that critics of sort of the forces of antiscience, those looking to confuse the public about the science will always draw upon that vulnerability, that as scientists we're never comfortable in stating things in absolutes because that's not the way the world works, that's not the way science works. unfortunately our detractors, those looking to sort of pollute the public disc

. >> michael mann posted on facebook page, we the people that are honest and up right all of the freedoms we have in america. >> pamela p sent us this photo and said, my son and all of his brothers serving in iraq keep telling us why you are proud americans. >> president obama is the worst president since world war ii. most say we could be better off if romney was elected two years ago. they are breaking down the reason why. >> in when you are in your 6th year campaigning and speeches means nothing. he talks about the ukraine, he does nothing. he talks about syria and iraq he does nothing. he talked about america's standing in the world. we are despised in the world. our standard is lower every where you look. >> the policies the president campaigned on they are not working. you can see this whether we are talking about the economy or obamacare, we can see this across the world. there is nowhere that this president can point today and say, there is my success. >> that poll found ronald reagan was the best president since world war ii. >> legendary rock bands styx and foreigner nearly losi

mann who died this week was carrying the disease. the ebola epidemic is now three times bigger than any virus ever reported. and as michaelit's going to take time before officials can bring it under control. >> reporter: it's the worst ebola outbreak in history and it continues to wreak havoc across west africa. the world health organization says there's now been at least 660 deaths from the disease since march and there's no sign of it slowing down. >> it's probably going to be several months before we're able to get a grip on this epidemic and this outbreak and reduce the number of cases. >> reporter: the number of total cases is nearly 1100, most of those in guinea where the outbreak originated. 314 people died there so far. in sierra leone, the death toll, 219. and in liberia, the virus has claimed 127 lives. even health workers are not immune. this week, the brave physician treated more than 100 patients in sierra leone. he is now quarantined. fear has affected communities and some people believing that the epidemic say punishment for past sins while others have expressed fears that the white people were conducting o

mann -- the man and the woman are being treated for minor smoke. >> a mother is looking for closure after her son was beaten to death in his bedroom. >> we set up a scholarship for michael. we had trees planted. at midnight on friday, june 22, 2012, police were called to the home on the 900 block of 8th street in south philadelphia. they found the body of michael fox beaten to death, police say he had been dead for two days. >> he may have known his assailants because there's no forced entry. >> reporter: the citizens crime commission is issuing a 1,000-dollar reward and the city is posting $20,000 for anyone with information leading to the arrest and conviction of the person responsible. all you have to do is call 215-546-tips. all calls will remain anonymous. diane said it's time for her son's killer to be brought to justice. le. >> -- we need to have closure. >> on he "healthcheck," weight watchers has been the most effective way to lose pounds. a diet pill took second place. have you seen tom corbett's negative ad with this actress. it's just not true. and more of the same from corbett. tom wolf's company is headquartered and files taxes right here in pennsylvania.