kosta grammatis, feeding a hungry planet. he's touring the farm going inside one of america's busiest airports. and i'm phil torres, i'm an entomologist. i study spiders in the rain forest of peru. that's our program let's do some science. ♪ ♪ ♪ are hey guys welcome to "techknow". i'm phil torres and here with kosta and shini. here in the u.s. when you think about tornado alley you think of oklahoma. you recently went there. >> very high frequency of tornadoes, 50 on average. we went to moore oklahoma, it was devastated by tornadoes on may 20th. we went to university technologists, let's take a look. >> west side of burton we have a major tornado coming down. >> may 20th, 2013, one of the worst tornadoes on record is captured on a time lapse video that went viral. >> people in west moore must be underground for this tornado. we have large large chunks of debris. >> the entire nation watched as the tornado took a direct hit on the high elementary. in moore. >> from the looks of the school i knew it wasn't looking good. >> wing

kosta grammatis, feeding a hungry planet. he's touring the farm going inside one of america's busiest airports.