Locust menace: FAO asks India to be on high alert for next 4 weeks

India, which is tackling the worst locust attack in 26 years for the last three months, should remain on "high alert" during the next four weeks, according to the UN's Food and Agriculture Organisation (FAO). Meanwhile, the Indian government has stepped up efforts and is using latest technology and equipment like drones and Bell helicopters for control of the menace.