A man who personally interrogated 9/11 mastermind Khalid Sheikh Mohammed sounded off tonight on criticism of the enhanced interrogation program.

In part two of a can’t-miss “Kelly File” interview, Megyn Kelly asked Dr. James Mitchell about the mindset of the CIA and interrogators when the program first began.

“They had ongoing information to suggest that they were trying to smuggle nuclear weapons into the United States. So there was credible evidence to suggest that there was another wave of attacks coming, and we couldn’t have it happen. They tried to decapitate us the last time; they tried to destroy our civilization,” he said.

According to Mitchell, CIA personnel were “clamoring” to do everything and anything that was legal to save American lives.

Mitchell also challenged criticism that the enhanced interrogation program was not effective.

“It is clear that that program produced results. It’s very easy in hindsight when you’re not in the reality of the moment, when you don’t have all of those pressures, to sort of look back from 2014 and see how the dots could be connected, sort of like people did after 9/11, when they second-guessed what people were doing in real-time.”

Mitchell described CIA analysts and targeters as incredible. He said that “to besmirch them is, I think, beyond the pale.”

Kelly asked: Was it torture?

“If it was torture, I would be in jail,” he responded.

“Did it feel like torture when you were doing it?” she asked.

“You know what, Ma’am, it felt like I was doing my duty. I didn’t like it, I didn’t enjoy it, I wasn’t thrilled by it, I found it repulsive at times, but I sucked it up and did my duty to keep people from dying,” he said.

Watch tonight’s interview above, and check out yesterday’s full interview here.