"The threat we face today is arguably worse than the one we confronted in 2001," former leaders of the 9/11 Commission wrote on Saturday.
That's the message from the chairman and vice chairman of the 9/11 Commission on the eve of the 15th anniversary of the Sept. 11, 2001, terrorist attacks.
In an op-ed published Saturday in USA Today, former New Jersey Gov. Thomas Kean and former Congressman Lee Hamilton emphasized the terrorism threat isn't just about us here at home — rather, it's a global issue. They called it "a spreading disease eating away at the foundation of the free, open and lawful international system."