Raising questions over Pakistan’s intent in agreeing to throw open the Kartarpur Corridor, the Punjab Police chief, Dinkar Gupta, Friday said the visa-free passage cleared for Sikh pilgrims was “a huge security challenge from terrorism point of view”. Claiming that there were reasons why the Corridor was not opened all these years, Director General of Punjab Police said that some elements based in the neighbouring country were “trying to woo the pilgrims and making overtures to them”. “Kartarpur offers a potential that you send somebody in the morning as an ordinary chap and by evening he comes back as trained terrorist actually. You are there for six hours, you can be taken to a firing range, you can be taught to make an IED,” Gupta said.