Live from NPR News in Washington, I'm Rylan Barton. The United States is sharing fresh evidence for what it claims was a secret Chinese nuclear test. NPR's Jeff Brumfield has more on the alleged test, which took place six years ago.

On June 22nd of 2020, a remote seismic station in Kazakhstan detected a tiny earthquake, except the U.S. says it wasn't

an earthquake at all. Christopher Yaw is an arms control official at the State Department. He says

the data looked clear. It is quite consistent with what you would expect from a nuclear explosive

test. Yaw shared the details during a talk at the Hudson Institute, a DC think tank.

Not everyone agrees Ben Dando is a seismologist with Norsear, an independent monitoring group.

He says the data are inconclusive.

We can't really confirm or deny whether a nuclear test took place at this point.

China is currently undergoing a massive expansion of its nuclear arsenal.

The Pentagon believes it could have a thousand nuclear warheads by 2030. Jeff Brumfield, NPR News.

The influential and at times controversial American leader Reverend Jesse Lewis Jackson has died.

NPR's Cheryl Corley reports Jackson built a national profile around

civil rights and political activism. Jesse Jackson's career spanned decades. In the 1960s, he was

active in the civil rights movement and was an aide to Martin Luther King Jr. Later, he founded his

Rainbow Push coalition. In the 1980s, Jackson ran for president twice.

His soaring speech at the 1988 Democratic National Convention electrified the audience.

America will get better and better. Keep hope alive. Keep hope alive.

Howard University Professor Clarence Lusane said Jackson also had a global footprint

as he spotlighted and mediated disputes during his travels.

He was kind of a political Mohammed Ali to many people around the world.

During an NPR interview in 2016, Jackson said while other civil rights activists died young martyrs, he was blessed to be a long-distance runner.

Cheryl Corley, NPR News.

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