Who is Narain Singh Chaura, former Khalistani militant who opened fire at Sukhbir Singh Badal at Golden Temple?

Shiromani Akali Dal chief Sukhbir Singh Badal was shot at by a man while he was performing the duty of ‘sewadar’ outside the Golden Temple in Punjab's Amritsar on Wednesday. Sukhbir Singh Badal, who was sitting in a wheelchair, escaped unhurt as the bullet hit a wall.