OKLAHOMA CITY (AP) — Although 26 years have passed since a truck bomb ripped through a federal building in downtown Oklahoma City, killing 168 people, the same domestic extremism that led to the attack still exists today, U.S. Attorney General Merrick Garland said Monday.

Garland, who led the investigation into the Oklahoma City bombing in 1995 as a Department of Justice staffer, delivered remarks during a remembrance ceremony at the Oklahoma City National Memorial and Museum, his voice occasionally cracking with emotion.

"Although many years have passed, the terror perpetrated by people like...