Democratic presidential candidate Hillary Clinton says the effort to “dismantle the global structure of terrorism” must be waged in the air, on the ground and on-line.

“This is the first time we have faced an adversary so sophisticated about using the Internet, using it to recruit vulnerable people, using it to train and provide information about planning attacks,” Clinton says.

The Associated Press is reporting the wife involved in this week’s shooting rampage in California used an alias to pledge her allegiance to ISIS in a Facebook post close to the time she and her husband started shooting. Former Secretary of State Clinton is campaigning in Iowa today. During a midday stop in Sioux City, Clinton discussed the California shootings.

“We’re learning more, literally by the hour,” Clinton said. “There certainly is much more support for the view that this was a terrorist act. I have a great deal of confidence in law enforcement, local, state, federal. And I am convinced that they will do everything they can to run down every lead, no matter where it might take them, anywhere in the world.”

Clinton touted her work, as a New York Senator, in the years following the 9/11 attacks. She’s calling for “vigilance” and Clinton said the U.S. must do a better job “collecting and analyzing information” about suspected terrorists.

“I’ve said repeatedly we need to redouble our efforts to dismantle the global structure of terrorism,” Clinton said. “We have to go after those who are on the Internet, radicalizing people.”

Clinton is also campaigning in Fort Dodge this afternoon. Republican candidates Chris Christie and Rand Paul are also making stops in Fort Dodge today. Ted Cruz is set to appear at a gun shop in suburban Des Moines this afternoon.

(Reporting by Woody Gottburg, KSCJ, Sioux City)