A ragpicker boy smiles as he stands on the tracks at a railway station in New Delhi February 18, 2014. India's "railway children" swelled by an estimated 120,000 runaways arriving each year at the stations of the world's fourth-largest railway network to make their homes there. They have fled poverty, violence and abuse or are simply seeking adventure, attracted by the bright lights of the big cities such as Delhi, Mumbai and Kolkata. REUTERS/Adnan Abidi (INDIA - Tags: TRANSPORT SOCIETY)