How could three Italians take flights from two Indian airports and reach their international destination without clearing mandatory immigration? This question is gripping India's aviation sector after a show-cause notice was issued to Air India over the Italian nationals flying from Amritsar to Delhi on an Air India flight in the early hours of September 4. They were then scheduled to travel onward from Delhi to Munich on Lufthansa flight LH-763. But there was a problem. The Ministry says the three passengers left India on the Lufthansa flight without undergoing mandatory departure immigration clearance. Here's what happened, how the government reacted, and what happens next. Watch the full video for more.