Josh Campbell spent twelve years in the FBI, including work as a supervisory special agent and as special assistant to FBI Director James Comey. He is now a CNN law enforcement analyst and the author of “Crossfire Hurricane: Inside Donald Trump’s War on the FBI.” David Priess sat down with Josh to discuss the mission of the Federal Bureau of Investigation, his career there, what he calls President Trump's war on the FBI, and a unique perspective on the day of Director Comey's firing.