Just a few weeks have passed since Inauguration Day, and President Donald Trump has already issued dozens of executive orders and actions — several relating to the U.S. immigration system and border security.

All told, Trump has signed 54 executive orders in just over two weeks back in office, which is already more than any president has signed in their first 100 days since President Harry Truman (57).

ICE has take a spotlight role in the wake of plans in Trump's administration for mass deportations. Here's what you need to know about the agency.