Department of Homeland Security Secretary John Kelly says the risk of a terror attack on the United States "as threatening today" as it was on 9/11.

Speaking at George Washington University on Tuesday, Kelly said the FBI currently has open terrorism investigations in all 50 states, and since 2013, there have been 37 ISIS-linked plots to attack the U.S.

Kelly called it an "unprecedented spike" in a type of violence that is "notoriously difficult to predict and control."

On "America's Newsroom" today, Rep. Peter King (R-NY) said it's becoming harder and harder to detect and stop homegrown terrorists.

He said that even though Kelly's message was an ominous one, it's comforting to know that he's committed to using all the resources of the Department of Homeland Security to keep Americans safe.

King said we are as equipped to deal with the threat as we ever have been, but the enemy is constantly adapting and evolving.

He explained that the internet is playing a major role in fueling homegrown violence, as it allows jihadists to spread their message and provide "how-to" manuals for building explosives.

"This is all part of the challenge facing the Department of Homeland Security."

Watch more above.

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