In a KTN news exclusive, we delve into the murky waters of male circumcision among street boys in Nairobi…one that takes us deep into the heart of Mathare slums where many street boys face the knife and are brought back to the streets nursing serious infections on their private parts. So dire is the situation that it has already seen one street boy lose his life. KTN's Timothy Otieno brings you "Knife of Greed", the story of the plight of vulnerable streets boys in Nairobi.