WASHINGTON (AP) — Bombings in New York and New Jersey — and a stabbing attack in Minnesota the same day — underscore that homegrown attacks inspired by violent extremists are as much a threat to the United States as those directed by terrorists, the nation's Homeland Security chief says.While all attacks are difficult to detect and prevent, Homeland Security Secretary Jeh Johnson said the United States and its allies continue to "take the fight militarily to [...]