dr. davies: our basic rearch program is to study large pieces of forest. we set up these research plots, which are 50 hectares in area, typically -- so that's a kilometer by half a kilometer -- in which we study every single tree species that occurs in those areas. we do it all one by one. we go out, we start at the corner of these big plots, and we tag and map and measure every tree bigger than a centimeter in diameter. that's as big as a little sapling in your garden. and we monitor everything. we have, in some of our research plots, more species of trees than the whole of north america or the whole of europe. that's a phenomenal number of species -- 1,000 species or 1,200 species in one plot. narrator: at 17 forest-dics plots throughout latin america, africa, and asia, davies' project, in collaboration with the arnold arboretum of harvard university, maintains an active database of more than 3 million trees of 6,000 species. dr. davies: this is a huge data set, which no one else in the world is doing this kind of research. and the idea of doing it right

so in the beginning then i worked with the -- i interface with dr. davis. we were doing something that hasn't been done before. that was essentially my job to shepherd the spacecraft through that and i was going all the way through launch. now once the thing lifted off, that was the end of my responsibilities and i didn't have anything to do with it. and the chachb command actually is that i reported strictly to the test conductor.in of comman actually is that i reported strictly to the test conductor. it was a little bit interesting in that somewhere in the chain i would change allegiance. in the preliminary stages each test has their own conduct you are, mike mcdonnell, north america had the capsule, the first stage of the test conductor, at then at some point they merge to the cvts -- or nasa test director. then i would report to nasa test director. and the unique position was that even through all this time, i did have the ability to stop the count if i saw something wrong, but i couldn't make it go again, because then somebody else had to make that dec

dr. angela davis was one of the leaders of the black power movement. >> i think it is important to show a film like this during black history month. >> she's featured in the documentary "the black power mix tape" which aired last week on pbs and features never before seen footage of davis and others. one of the most visible and radical leaders of her time, she believes it is important to reflect on what the struggle for black liberation has meant to the entire history of america. i think the struggle of black people and their allies, it's a struggle for freedom that affects every american this country and it has global implications as well. so i would like to think of black history month not so much as the history of black people but rather when we reflect on the struggle for freedom. >> everything about who i am comes from growing up in brooklyn and comes from my parents. they laid the foundation. >> sreenivasan: the hip-hop artist narrates the film "the black power mix cape" and is opposed to it being relegated to a single month. >> black history month is a way to help people to at leas

dr. dorothy heights. that is sammy davis >> saturday march 3, they are taking their performance to the kennedy center. >> that is a good-looking group. this is another good looking group. i had a chance to spend time with some kids today at riverdale baptist schools. i had a chance to spend time with students. we talked about going after their dreams. a celebration of african- american accomplishments that included some good food and dancing. way to go. good luck to you down the road. that is it for abc 7 is at 5:00. >> heavy storms have moved out here we are waiting for strong winds to move in. >> some are calling it a controversial apology. high-ranking defense officials say sorry at this mosque. i will tell you what they said and why. >>live and inhd, this is abc 7 news at 6:00.

davis investigating. >> reporter: some think the ons tiure for a hangover is time. and then there's dr.rossman. >> once you have the hangover, you're done. you know, there's at least four hours of your life that's just lost. >> reporter: he says he's created a way to prevent hangovers. it's called bytox. and he says it does for the hangover what dramamine patches do for morning sickness. he says this patch is like being attached to an i.v., continuously infusing vitamins into the bloodstream. >> alcohol itself is a diuretic. and what happens is the kidneys go into overdrive and you're basically washing out everything that's water-soluble. >> reporter: he created the patch with alex flieshmaker who suffered a hangover so awful after a night out with the boys he had to call on his family friend dr. grossman for help. >> he administered an i.v. full of vitamins. and within ten minutes i felt great. >> reporter: hangover remedies have been around for as long as booze. coffee, honey, greasy foods, hair of the dog. and now there's blowfish. no, not the poisonous puffer fish. a new over-the-co

davis says, she met a doctor who claims he has the cure. >> reporter: some think the only sure cure for a hangover is time. and then there's dr. grossman. >> once you have the hangover, you're done. you know, there's at least four hours of your life that's just lost. >> reporter: he says he's created a way to prevent hangovers. it's called bytox. and he says it does for the hangover what dramamine patches do for morning sickness. he says this patch is like being attached to an iv continuously infusing vitamins into the bloodstream. >> alcohol itself is a diuretic. and what happens is the kidneys go into overdrive and you're basically washing out everything that's water-soluble. >> reporter: he created the patch with alex flieshmaker who suffered a hangover so awful after a night out with the boys he had to call on his family friend dr. grossman for help. >> he administered an iv full of vitamins. and within ten minutes i felt great. >> reporter: hangover remedies have been around for as long as booze. coffee, honey, greasy foods, hair of the dog. and now there's blowfish. no, not the poisonous puffer fish. a new over-the-count

davis. she'll be buried tomorrow. joining us are dylan howard, senior executive editor for radar on-line and dr.g. >> judge: dylan, i'm gog start with you. everyone is talking about whitney's ex, bobby brown, at the funeral. what happened today? >> it was really the low point on a heart warming day, a day in which the world paid tribute to whitney houston. but as we understand it tonight, there are conflicting reports. according to houston family insiders, bobby brown turned up at the church with an entourage of nine. having been told there was only room for three people. you must remember, this was a church that routinely only holds 300 people. and today it was packed with 1500. though bobby brown is defining that. i want to read you a brief statement that has been sent to me from his camp. he says, my children and i were invited to the funeral of my ex-wife. we were seated by security and then subsequently asked to move on three separate occasions. he goes on to say, i fail to understand why security treated my family this way. security then prevent medicine from attempting to sea so my daught

davis. houston's funeral will be held in newark, new jersey later this week. joining me tonight is dr.ficer at the phoenix house. so sad, isn't it? >> it's very sad. >> it's all too often we see big stars struggle with drug addiction. what is it? is it the pressure? is it the visibility? is it the money? is it not knowing how to handle the fame? to many of those things. >> i think one of the things is we could answer that, we'd know what to do and better how to help. i think that celebrities have more pressure in many ways. they're less likely for people to confront them about their behavior or missed appointments and things like that, but i think it's an equal opportunity illness and that addiction hits everybody. you just hear about it and see it when it's a celebrity. you see it when they reup lapse and not doing well. sdwloo some of the pictures of whitney houston before she died, a lot of people around her. it didn't look good. it looked pretty sad. what kind of pressure is on peers to help her out? >> he did look pretty disheveled, and it's on your friends, family, those close to

one of those by clive davis the music mogul at the hotel where her body was found, the beverly hilton. i want to ask dre forensic pathologt and dori dorothy from in touch magazine. doctor, quickly you said there was industrycations of information that we may find out what happened very quickly. >> by tomorrow. the first thing is that when the police called the coroner's office to remove the remains finish the onseen investigation which would include taking statements from everybody that was there and they have to keep everybody in mind. they took any bill bottles and doctors that may have prescribed medications for her and maybe she had heart disease and high pressure medicine which would be important as potential natural death. >> harris: sounds so familiar. amy winehouse. michael jackson. so many of these celebrities we go and a we see them gathering, some of these same items and not to say there is any link or but we don't know. but a lot of this same types of details. >> because they dial young and young people are not supposed to die of natural diseases but they sometimes do. i think the next step

nights in beverly hills preparing for clive davis' party tonight ant that entertainer rayjay apparently found her dead. that's according to alan duke. let's go now to dr. drew from hln. dr. drew, it's amazing to have to report this. so young, just 48 years old and we have seen -- and we know over the course of the last at least ten years what whitney houston had been dealing with. but that said we've lost a great talent. >> yeah. as with every time i have to get on television and have this conversation, it's a reminder that people that are in the public eye are human beings and some of them have very serious conditions and they can be the brunt of jokes at times but the fact is these things are potentially deadly. now obviously i'm taking great liberty in assuming or even suggesting that her substantice history has something to do with what happened here. but if i'm a betting man, that's how it goes. a reminder that these are deadly conditions and celebrities are no different than anybody else, septemb except it's all done very publicly. poor demi is sick but in treatment and now whitney is not with us. >> dr. drew, don't go anywhere. let's listen to