Explanation:

• National Intelligence Grid to start operation from December 31, 2020.
• The National Intelligence Grid (NATGRID) is a counter terrorism Programme. The grid connects databases of core security agencies of India. It utilizes technologies like Big Data to study and analyze huge amounts of data from various intelligence and enforcement agencies. It was first proposed after the Mumbai terror attacks in 2008.
• The network collates data from various agencies and ministries of GoI. The data includes credit card transactions, bank account details, tax details, visa, immigration records and air travel.
• NATGRID is being implemented in four phases. The first two phases were approved in 2011. However, their implementation slowed down after 2012 due to political reasons. The third and fourth phases required amendments of several laws and hence were delayed.