. >> nick louis, a professor of science at williams smith colleges in geneva, new york. >> i tell my students to imagine a bald top of the mountain. just a little push and that ball goes all the way the mountain. just a little push rices vigorously in the atmosphere and produces intense snow. >> it feels like weather is becoming extreme. >> a lot of research has shown that, as it will become the norm. >> does science suggest this is going to happen more and more. >> i think that's the reasonable inference from what we're seeing. >> when is extreme weather like buffalo's due to climate change, and when is it just plain wild weather. there is a new field called attribution science that tries to assess whether climate change played a role in these extreme weather events. take the extreme heat that caused wildfires in 2013. was it climate change? according to research published in the bulletin of the meteorological society, probably yes. and what about the winter of 2014, climate change or just wild weather? a study out of oxford university said that that event was probably climate chang

jury that it suffices if the defendant knows that this is an illegal drug because of its had a louis jen nick effect? >> i don't think -- again the critical question is illegal drug. if by that you mean illegal drug -- >> know that it's an illegal drug because of its had a louis jen nick effect. it seems to me that should suffice for men's ray i can't. >> just to be clear -- >> excuse me. and then it's shown that this is chemically similar. >> i think that the court would have to tell the jury that you can take into account the defendant's knowledge of its had a louis jen nick effect in deciding whether he nude it was illegal under the controlled substances act itself. so what i'm quibbling with is just the unadorned word illegal. i don't think it would be sufficient if a jury was convinced that the defendant it's an hallucinogenic effect and illegal under state law. i don't think that a jury could if it if you believe that find the men's ray i can't established unless they went under this factual knowledge prong that's the ordinary way in which knowledge unlawful procession of a prohibited i

. >> former eagles quarterback nick foles now in st. louis getting praise from his rams receivers. it says we love nick. he's adjusting to a completely new offense. he was out of the shotgun for the most part in chip kelly's system. now he's behind center in a run-first scheme. >> there's different concepts passing concepts that are similar, that have similar reads but it's a different offense. we're going to have different terminology, different things going on but that's the fun of it. i get to learn more football and it's a great offense to play in. >> the belmont stakes is today. it is now here. american pharoah yesterday at belmont getting ready, trying to become the first horse to win the triple crown in 37 years. here is his trainer, bob baffert. >> he's still sharp. that's what he's shown us during his whole campaign that he still wants to do -- he's happy when he goes out there. he wants to go out there and gallop and have fun. that's him. >> hopefully he has fun today here on "nbc 10 news." 4:30 the coverage starts. the belmont stakes right about 6:50 once again right here

nick is adjusting to a completely new offense in st. louis at their practices.was out of the shotgun for the most part in chip kelly's system. now he's behind center in a run-first team. >> there's different concepts, passing concepts that are similar, that have similar reads but it's a different offense. we're going to have different terminology, different things going on. but that's the fun of it. i get to learn more football. it's a great offense to play in. >> the belmont stakes is today. is now here. american pharoah yesterday at belmont getting ready, trying to become the first horse to win the triple crown in 37 years. here is his trainer, bob baffert. >> he's still sharp. that's what he's shown us during this whole campaign, that he still wants to do, that he's happy. when he goes out there, he wants to go out there and gallop and have fun. that's him. >> hopefully he has fun today here on nbc 10. 4:30 the coverage starts. the belmont stakes right about 6:50. hopefully history will be made. i'm john clark. enjoy your weekend. >> the hawks scored a come-f

nick. he is adjusting to a completely new offense in st. louis.e are their practices. >> there are concepts with similar reads. but it's a different offense. we have different terminology and things going on. but that's the fun of it. i get to learn more football and it's a great offensive plan. >>> nba finals no love for cleveland. no kyrie irving. he is out for three to four months after fracturing his kneecaps. >>> the belmont stakes is tomorrow. american pharoah trying to become the first horse to win the triple crown in 37 years. >> he's still sharp. that's what he has shown us during this whole campaign. you know he still wants to do -- he's happy when he goes out there. he wants to go out there and gallop and have fun. >> full coverage right here on nbc 10 for the belmont stakes starting at 4:30. the race at about 6:50. i'm john clark, enjoy your weekend, everybody. we work weekends here. because it works for our patients. here, at cancer treatment centers of america in philadelphia, we give our patients the freedom to make appointments tha

nick, what can we expect? >> reporter: it's a widespread area for hail and damaging winds as we head through this evening. all the way from detroit chicago, st. louis to washington d.c., philadelphia and pittsburgh. and tomorrow basically the same area. we're going to add new york city in for the possibility of heavy rain and flash flooding there. meanwhile, nick, this disturbance, does this become a tropical storm? >> we very well could see a tropical depression or storm out of this. national hurricane center watching this area of low pressure entering the gulf of mexico, headed toward texas and whether or not it gets a name, if it does its name will be bill, but even if it doesn't get a name, lots of heavy rain including five to eight inches there around the houston area, jeff. >> glor: an area that is already soaked. nick walker, thank you very much. we are learning more about the gunmen who ambushed officers at police headquarters in dallas yesterday. family members say there were signs he needed help years ago. here's vincente arenas. >> reporter: moments after james boulware drove up to balance as police headquarters and began his shooting sp