LUCKNOW, Aug. 6 -- A father and son from Unnao were killed after a speeding unidentified vehicle hit their motorcycle from behind on Mohan Road in Lucknow's Kakori area late Monday night. The incident occurred around 2:30 am near the Dauli Kheda turn. The victims, Dharmapal (46) and his son Govind (26), were returning to their home in Hamirpur village, Unnao, after visiting Dharmapal's wife, who is admitted to the trauma centre in Lucknow. According to the police, the impact of the collision was so severe that both men were flung several feet into the air....