Indian investigators examine the bus where a 23-year-old New Delhi woman was brutally gang raped and beaten last December. The trainee physiotherapist later died of her injuries, sparking national calls to protect women. Months later, Indian courts are set to decide the fate on Tuesday of four men accused in the attack. Police say DNA tests have linked at least two of the men to the crime, one of whom tried to kill himself while in custody. All could face the death penalty.