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.

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.

The 9:02 gate at the Oklahoma City National Memorial and Museum is pictured behind a sign announcing the closure of the site, Wednesday, April 15, 2020, in Oklahoma City. “I’m not with my sisters today, I’m not with my mother today,” in Oklahoma City, he said by phone from Baltimore, where he now lives. “They did just an extraordinary ceremony under extraordinary circumstances, it was just remarkable,” Ashwood said of the video put together by the Oklahoma City National Memorial and Museum. “The 25th is another time for us here in Oklahoma City to refocus on what makes the event and the site relevant in the decades to come." “People in Oklahoma City sort of have a special obligation to stand for the idea that we have much more in common than we have different," he said.

FILE - In this March 18, 2020 file photo, visitors walk next to the reflecting pool at the Oklahoma City National Memorial and Museum in Oklahoma City. The Oklahoma City National Memorial and Museum has announced that it will offer a recorded, one-hour television program in place of a live ceremony to mark the 25th anniversary of the Oklahoma City bombing due to concerns about the spread of the coronavirus. But prosecutors would soon learn the Oklahoma City attackers were U.S. citizens and that their bombing was inspired by a different 1993 event. McVeigh had visited the compound during the 51-day standoff that preceded the raid, and prosecutors say that fueled his anger toward the federal government, culminating in the Oklahoma City attack. Acknowledging that the Oklahoma City bombing frequently is referred to as the worst act of domestic terrorism in U.S. history, McCann pointed to another atrocity in Oklahoma.

FILE - This Wednesday, April 19, 1995 file photo shows the north side of the Alfred Murrah Federal Building in Oklahoma City after the deadliest act of domestic terrorism in U.S. history. (AP Photo)OKLAHOMA CITY, Okla. – Oklahoma City honors victims of the 1995 bombing that shocked the nation in what remains the deadliest act of domestic terrorism in U.S. history through a memorial and museum, annual remembrance ceremonies and a marathon. In February, the Oklahoma City Philharmonic performed “Of Thee I Sing,” a symphonic and choral presentation it commissioned. The Oklahoma City Ballet is planning multiple performances, including one choreographed to songs by country singer Vince Gill, a native of Oklahoma. Other commemorations this year include the NBA’s Oklahoma City Thunder providing free admission once monthly to the museum and wearing special uniforms at some games.

(AP Photo/Cedar Attanasio, File)White supremacists and other far-right extremists killed at least 38 people in the U.S. in 2019, the sixth deadliest year for violence by all domestic extremists since 1970, according to a report issued Wednesday by a group that fights anti-semitism. The ADL’s annual Murder and Extremism report says domestic extremists of all kinds killed 42 people in a total of 17 separate incidents last year, down from 53 killings in 2018 but higher than the 41 in 2017. "This is part of a general trend of increasingly lethal attacks by domestic extremists in the United States," the report says. Right-wing extremists killed at least 330 people over the past decade, accounting for 76% of all domestic extremist-related killings. Fourteen of the 17 cases of killings by domestic extremists last year involved a single death, the ADL says.