In 2016, Mike Flynn burst on the national stage with his famous "lock her up" comments at the Republican National Convention in Cleveland, in reference to Democratic presidential nominee Hillary Clinton. He eventually became President Donald Trump's national security adviser but was fired 24 days into the job after suspicions about his relationship with Russian President Vladimir Putin and other Russians came to light. Target USA digs deeper into who Flynn is, partly through a never-before broadcast interview from 2015 that sheds some light on his military career and his views on Russia.