>> we want to take to you pad gas car now, the island nation off the southeastern coast of africa. the people there are deali with a modern day plague, not lice or frogs or boils, as wesee, it's locusts. >> this is what the locust invasion looks like that's threatening madagascar's 22 million people. most already live below the poverty line. and now the locust are devouring large amounts of rice and corn, the main staples there. >> if we don't react as planned by june, actually, there will be a famine. >> alexander winn is with the united nations food and agriculture organization. he's stationed in madagascar. >> all those people, two-thirds of the population will have big problems accessing food. >> reporter: a tropical cyclone crippled their food