andy gallagher, al jazeera, new york. >> thanks for watching, i'll see you again, bye for now. only on al jazeera america >> [gunshot].

are andy gallagher, al jazeera new york. >> thanks for watching al jazeera america. i'm stephanie sy. s rachelle oldmixon takes a test to find out what's in her dna. kyle hill is an engineer. tonight he's got the innovation

are andy gallagher, al jazeera new york. >> thanks for watching al jazeera america. i'm stephanie sy. s rachelle oldmixon takes a test to find out what's in her dna. kyle hill is an engineer. tonight he's got the innovation that will light up las vegas, a unique plant that stores light during the kay, to light up the night . i'm phil torres, i'm an entomologist. but tonight, i've got the story that will have you shaking your heads. why bugs should be a part of your next meal. that's the story, now let's do some science. are ♪ ♪ ♪ >> welcome to "techknow". i'm phil torres and today i'm here with kyle, lindsay and rachelle. we're going to start with a story of how we can use our dna in medicine . rachelle, what do you have? >> i submitted my dna for a company called 23andme. let's find out. >> simple test, nothing complicated. the first thing i have to do is take the tune and i get to fill it with slief hav splie saliva. you can watch me spit. that's done. i joined 23 million people who sent their saliva to 23andme. to conduct a personal dna test. they begin with our 4

andy gallagher reports >> reporter: high in the mountains of northwestern haiti, it's only rained once in the last seven months. this valley should be full of healthy crops and livestock but it's dry and barren. it is making life harsh and follows two years of below-average rainfall. tr tran. >> the local farmer tells us he planted crops? september only to watch them wither and die. in a region already remote and poor, the effects of drought have been felt throughout the community. school meals are rationed and almost all of the food is being brought in from the outside. its supplies are running out. >> it affects children in so many ways. when they don't eat at home, you will or if you see them in class, they will be exhausted a all day. >> this part of haiti depends almost entirely on agriculture and there has been some success in helping farmers to build stone walls to keep soil in place. other issues are hard to attack. >> when rains come, all too often, the fertile soil is washed away because of deforestation, there is nothing to keep it in the ground, and that is one of the bigge

andy gallagher reports. >> the mission was to help lower manhattan recover from the attacks of 9/11.rby neighborhood was badly hit, and residents were simply scared away, and others had concerns. it is actually become part of the city, and hopefully will become something that will last for a long long time. now it is busting, more construction marks the rebirth of a once struggling neighborhood. >> tri-becca has done more than just emerge from the shadow, this is one of the most exclusive neighborhoods in manhattan. a bun bedroom apartment will cost you at least $1.5 million. but the festival itself has become a steppingstone, into one of the world's largest film markets. there were more than 600 entries this year. from bhutan, through to china, and ireland, it is a mix of undiscovered talent that makes this festival unique. >> people from all over the world are submitting films and having them accepted and is it is a chance for their work to be seen. some of these may never come out, they may not end up on television, but they are seen at the festival. >> last year over 100,000 peop

andy gallagher reports from the devastated community of may d flower. >> reporter: the tornado has cuth of restricti restriction -- destruction across three states but arkansas borre the bunt of the damage. homes and lives were left in ruins. >> our memories are gone. and we'll have to find them, hopefully. >> here's some memories, we have children and grandchildren. just trying to find some things that we have had all of our lives. >> reporter: the satellite images from nasa show the sheer size of the storm system and many are still in its path. >> i want everyone affected by this tragedy to know that fema and the federal government is on the ground and will help our fellow americans in need working with state and local officials, and i want everybody to know that your country will be there to help you recover and rebuild as long as it takes. >> reporter: residents are now trying to recover what they can. the warning came just minutes before the tornado hit. the search and rescue depreciation is still underway here in arkansas, but when you see the raw power of this tornado on the gro

andy gallagher is live with more, over to you.y, this is not a who's who, you won't see movie stars or papillatesy here, but what it is a global film festival. and documentaries so it is that spring board, but remember, the film festival was initially set up shortly after the attacks of sent 11ing to revitalize lower manhattan. when the film festival began, it was aimed to help manhattan, in the day that followed the collapse of the twin towers it is batly hit. p were simply scared away. it has become part of the city, and hopefully lit be something that will last for a long long time. >> now it is bustling. new construction mark as rebirth of a once struggling neighborhood. >> it has done more than just emerge from the shadow. this is now one of the most exclusive neighborhoods. a one bedroom apartment here will cost you at least $1.5 million. well out of reach for any aspiring film maker, but the festival has become a stepping zone into one of the world's. >> laest film markets. whittled down to just a hand fum, through to china

andy gallagher tells us why the lime business is on the rocks. >> in mexico it's hard to think of life without limes. this little citrus is a staple of daily living. limes are used to flavour food, ward off illness and adorn drinks, for many it's the taste of a nation. without it they'd be lost. >> i put lime op everything. the only thing i don't put lime on is milk. otherwise i would. a salad is no good without lime. it's port of our culture. >> limes are an luxury item. prices have soared. production is down. prices tripled in recent weeks, reaching highs. >> translation: customers ask how many for limes. you tell them. they call you crazy and leave. >> mexico's lime groves have been hit by disease and bad weather. something called yellow dragon plague means the groves are producing less fruit. there's talk of farmers hoarding their crops and selling when the price goes up. some like this man are just making the best of a bad situation. his depictions of a nation craving limes is seen by million, and it's a way of getting through the crisis. >>translation: we mexicans laugh about thi

at least 100,000 people have received help so far, but as andy gallagher reports, supplies are running out. >> reporter: high in the mountains of northwestern haiti, it's only rained once in the last seven months. this valley should be full of healthy crops and livestock. instead it's dry and barren. the lack of water is making life harsh and follows two previous years of below-average rainfall. local farmer charles tells us he planted his crops in september, only to watch them wither and die. in a region already remote and poor, the effects of drought have been felt throughout the community. meals are rationed and almost all the food is brought in from the outside with supplies, help and time running out. >> translator: the drought impacts the children in so many ways. when at the don't eat at home, they don't come to school. when they do show up in class, they will be exhausted all day. >> reporter: this part of haiti depends almost entirely on agriculture, and there's been some success to help farmers to build stone walls to keep the soil in place. other issues are harder to tackle.

several others in the pipeline, not just for nasa but also for private companies as al jazeera's andy gallagher, privately-funded space ventures could open the doors to a new era of space exploration. >> in an age of government cutbacks, ambition plans are often little more than animated visions of what it might look like but this is part of the project in the flesh, a nasa project to take astronauts past mars and venus. plans of a manned mission in 221. the kennedy space center. >> returning humans to deep space where we haven't been for 40 years, pretty exciting to be a part of that >> reporter: the days of solely government funded space programs are gone. you could be fooled into thinking for the next few years, this famous site of missions will be quiet. when the space program ended, many hailed it as at end of a golden age. many are vying for ambitious plo take space travel into a new era. >> is a partnership between the u.s. government and the commercial sector keen to cash in on space exploration. in many ways, this is a renaissance in space travel built on florida's legacy but executive