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Once the Cold War ended, much of Russia's surplus uranium from thousands of decommissioned weapons wound up in crumbling military facilities. In 1993, the U.S. Department of Energy made a deal to have the material converted to fuel for U.S. power plants. The last shipment arrives today.

The guitarist said he didn't "really have all that much technique anyway," but it was clearly enough to influence half a century of jazz musicians. Peers and proteges like Sonny Rollins, Julian Lage and John Scofield reflect on one of the finest ever on his instrument.

Recently, a few musical alchemists have been tweaking popular songs, converting minor keys to major ones and raising questions about how the human brain processes music.

Venezuela's economic woes provide plenty of fodder for comedians. But the government doesn't seem to have a sense of humor: Comics say they are being targeted and prevented from performing.

An experimental technique called optogenetics is starting to change the way researchers look at the brain. The tool allows them to switch entire brain circuits on and off using light, and may help figure out what's going wrong in brain ailments from epilepsy to depression.

Day after day, there is less food on the shelves, less power to turn on lights or run businesses and more anger over the difficulties. But opposition efforts to recall the president are being stymied.

Donald Trump has said he doesn't need donors' money. But as he pivots to the general election, Trump is more focused on raising campaign cash — as well as polling and policy.

The Trump Administration is using an obscure and controversial immigration law from 1952 to try to deport Pro-Palestinian activist Mahmoud Khalil.

Rio de Janeiro made a big push to provide security in its shantytowns. But some, which were touted as models, are again plagued by gang violence that has terrified residents.

North Korean leader Kim Jong Un is directly sanctioned for the first time for his role in human rights abuses.