A bomb with a force powerful enough to instantly destroy much of a nine-story building shattered a quiet Oklahoma City morning and sent a shock wave through America.

Thirty years after a truck bomb detonated outside a federal building in the nation’s heartland, deep scars still remain from the deadliest homegrown attack on U.S. soil.

Closing arguments are underway in the federal trial of three former Memphis police officers charged with violating Tyre Nichols’ civil rights in a fatal beating.

It’s been 28 years since a truck bomb ripped through a federal building in downtown Oklahoma City and killed 168 people. Today they're being remembered.

Experts say far-right groups in the U.S. are taking a more dangerously radical turn as four men go on trial in an alleged scheme to kidnap Michigan’s governor.

Activists Tyasha Harrison, left, and Holly T. Bird pose along the Grand Traverse Bay waterfront in Traverse City, Mich., Feb. 13, 2021. “In this age, no place is an island,” said Warren Call, president of a business organization in Traverse City, the county seat. Producers of the fruit for which Traverse City bills itself “cherry capital of the world” are struggling to survive. The area remains solidly Republican, although Democrats have captured two county commission seats representing Traverse City, which has a gay mayor. Her organization formed after a Black Lives Matter rally along the Traverse City waterfront last summer.

Michigan Gov. Gretchen Whitmer campaigns with Dan O'Neil, a Democratic candidate for the Michigan House in Traverse City, Mich., Friday, Oct. 9, 2020. Whitmer visited the area the day after police announced a foiled plot to kidnap the governor. (AP Photo/John Flesher)

Gretchen Whitmer campaigns with Dan O'Neil, a Democratic candidate for the Michigan House in Traverse City, Mich., Friday, Oct. 9, 2020. In many ways, their focus is unchanged, including contempt for authority, reverence for the Second Amendment and backwoods military-style training exercises. The ADL said it wasn’t immediately clear if the suspects had extensive ties to other self-styled militia groups. Their more recent focus on state governments makes the job of monitoring them and preventing terrorist activities harder, he said. I have asked for their help and none of them have done a darn thing.”___Kunzelman reported from College Park, Maryland.

A Lebanese army helicopter flies over the scene where an explosion hit the seaport of Beirut, Lebanon, Wednesday, Aug. 5, 2020. Prime Minister Hassan Diab, in a short televised speech, has appealed to all countries and friends of Lebanon to extend help to the small nation, saying: "We are witnessing a real catastrophe." (AP Photo/Hussein Malla)

Some other recent deadly explosions involving ammonium nitrate:Aug. 12, 2015: A massive warehouse explosion rocked the port city of Tianjin, China, killing 173 people and injuring nearly 800. Investigators found the warehouse held illegal stores of ammonium nitrate, which caught fire and caused a series of blasts. The fire ignited in a seed room and quickly engulfed an area where ammonium nitrate was stored in wooden containers. According to investigators, the primary ingredient of the main bomb that tore through the popular Kuta nightclub district was ammonium nitrate. Ammonium nitrate was found to be the main ingredient.