An exhibitor explains the features of a weapon to a visitor at the International Police Expo 2019 at Pragati Maidan, in New Delhi. (Image: PTI), A model of an air surveillance system on display at the International Police Expo 2019, in New Delhi. (Image: PTI), Visitors pose for photographs with a dummy dressed an anti-mine suit at the International Police Expo 2019, in New Delhi. (Image: PTI), An exhibitor explains the features of a defence system which can be mounted on a dog to a visitor at the International Police Expo 2019, in New Delhi. (Image: PTI), Visitors attend the International Police Expo 2019 at Pragati Maidan, in New Delhi. (Image: PTI), An exhibitor explains the features of a weapon to a visitor at the International Police Expo 2019 at Pragati Maidan, in New Delhi. (Image: PTI), A model of an air surveillance system on display at the International Police Expo 2019, in New Delhi. (Image: PTI)