“...since we’re retreating over there, we’d better get ready to fight them here.”

Brian Bennett reports at the L.A. Times,

Alarmed about the growing threat from Islamic State, the Obama administration has dramatically stepped up warnings of potential terrorist attacks on American soil after several years of relative calm.

Behind the scenes, U.S. authorities have raised defenses at U.S. military bases, put local police forces on alert and increased surveillance at the nation's airports, railroads, shopping malls, energy plants and other potential targets.

...U.S. counter-terrorism officials initially viewed Islamic State as primarily a regional security threat, focused on expanding and protecting its self-proclaimed Islamist caliphate in Syria and Iraq, rather than launching attacks abroad.

But the analysis has shifted sharply as gunmen inspired by the group, but not controlled or assisted by them, opened fire at the Parliament in Ottawa; at a cafe in Sydney, Australia; at a kosher grocery in Paris; and, on May 3, in Garland, Texas.

Read more here.
In linking to Bennett's article, Glenn Reynolds writes at Instapundit,

It used to be “fight them over there so we don’t have to fight them here.” Now, I guess, it’s “since we’re retreating over there, we’d better get ready to fight them here.”