The Uttar Pradesh Police have come under criticism and ridicule on social media after their personnel were seen doing the impossible in Ghaziabad near Delhi. Viral videos showed a policeman using a mobile phone to scan people by touching their back, like a supermarket barcode reader. Typically, citizenship verification checks documents like passports or biometrics like Aadhaar. But the policeman was seen using a 'mysterious' machine that claimed to give the address of a person's place of origin simply by touching their back....