The birth anniversary of Guru Nanak Dev, founder of Sikhism, is celebrated as Guru Nanak Gurpurab across the world by the people of Sikh community. This year, Pakistan will see the opening of Kartarpur Corridor – something which has been a long-time demand by the Sikh people living in India. What is the story of Kartarpur? How is it connected to Guru Nanak Dev? Here are answers to all your questions.