Since the beginning of the year, East Africa has been suffering from an invasion of locusts which multiply after an unusually long rainy season. In Kenya, the last time this happened was 70 years ago. Tens of millions of insects destroy everything in their path, including crops and grass to feed livestock. Nothing escapes the appetite of swarms. The locusts have reproduced and their descendants are expected to take flight in the coming days. The country is running against time to avoid a massive crisis and has even called on a paramilitary group. Report from our correspondents.