MUMBAI - On a hot summer afternoon, 23-year old Nizamudin Abdul Rahim Khan is playing cricket on a muddy, unpaved road in the Rafiq Nagar slum in India's financial capital, Mumbai. Here, there is scant evidence of India's fast-growing economy. Bordering what was once Asia's largest garbage dumping ground, Rafiq Nagar and surrounding areas are home to an estimated 800,000...