Krishna and her son, Alok. Krishna thinks she’s about 42 years old. She knows her husband was 38 years old when he died of AIDS seven years ago. They left their native village in Bihar, India’s poorest state, about 18 years ago, with their three children to be near his parents who’d moved to Mumbai, all of them with a desire to escape rural poverty and seek better opportunities in a mega city full of dreamers and doers. A slight, short woman with a wide smile, Krishna radiate