Tourists walk in the middle of the dried-up area of Lake Nakuru in Kenya's Rift Valley, 160km (99 miles) west of the capital Nairobi, November 11, 2006. ccording to Kenya Wildlife Services, the flamingo population at the lake has decreased to 200,000 from 800,000 because of the lack of water due to the massive destruction of the lake's main catchment area - the Mau forest. REUTERS/Antony Njuguna (KENYA)