by Fran BLANDY MERU, Kenya (AFP) — As dawn breaks in central Kenya, a helicopter lifts off in a race to find roosting locusts before the sun warms their bodies and sends them on a ravenous flight through farmland. Pilot Kieran Allen begins his painstaking survey from zebra-filled plains and lush maize farms, to dramatic forested valleys and the vast arid expanses further north, his eyes scouring the landscape for signs of the massed insects. […]