Overnight flash floods in Kenya's capital have killed at least 23 people and caused diversions at the country's main airport - the biggest in East Africa. The military has been deployed to assist after dozens of cars were washed away in Nairobi, with some motorists in the capital being stranded for hours. George Seda, the chief of police in Nairobi, warned that the number of people killed may rise. Image: A man walks on a roof partially submerged in flood water after heavy rains flooded a