Fox & Friends host Steve Doocy asked whether Democratic presidential nominee Hillary Clinton revealed “a national security secret” that “there’s four minutes response time with the nuclear launch codes” during the final presidential debate, noting, “I did not know that.” However, multiple news outlets have reported on the “four-minute window” for nuclear launch decisions and have outlined the entire chain of command process for initiating a nuclear strike, spurred by Republican presidential nominee Donald Trump’s cavalier statements about the use of nuclear weapons. From the October 20 edition of Fox News' Fox & Friends: 

STEVE DOOCY: One other stunning thing that I was noticing online this morning, did Hillary Clinton reveal a national security secret that we'd never heard before? At one point she revealed that it takes four minutes, there’s four minutes response time with the nuclear launch codes. Had we ever heard that before?

AINSLEY EARHARDT: Yeah. You’re right.

STEVE DOOCY: By the time somebody says, OK we're going to hit somebody until the time it actually is the point of no return, it takes four minutes. I did not know that.