Bangladesh is one of the world's most densely populated nations on Earth. And the capital Dhaka is one of Asia's fastest growing cities. News and documentary producer Stephen Sapienza reports on an innovative program that has found ways to provide clean water and sewage services to Dhaka's urban slum dwellers.

Bangladesh is one of the world's most densely populated nations on Earth. And the capital Dhaka is one of Asia's fastest growing cities. News and documentary producer Stephen Sapienza reports on an innovative program that has found ways to provide clean water and sewage services to Dhaka's urban slum dwellers.