OKLAHOMA CITY (AP) — Bud Welch knows something about the human cost of terrorism. His 23-year-old daughter was killed when a rental truck packed with explosives destroyed the Oklahoma City federal building.

That was in 1995, when domestic terrorism seemed to be the nation's most immediate security threat. Now President Donald Trump sees the greatest risk in potential attackers who sneak into the U.S. from abroad. But Welch and others say the administration can't ignore threats from home.

"ISIS, to me, is really not a hell of a lot different than the militia movement in the U.S.," he said, referring to anti-government groups that were provoked by deadly standoffs with federal agents in Ruby Ridge, Idaho, and Waco, Texas — two flashpoints cited by Oklahoma City bomber Timothy McVeigh.

A list of worldwide attacks recently released by Trump's administration left off many that were carried out by right-wing extremists and white supremacists. And organizations that track terrorist and hate groups say the government focuses too narrowly on threats from the outside instead of adopting a broader approach.