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Demand for batteries has sent lithium prices soaring. But building new mines is controversial and time-consuming. So existing mines are hitting overdrive and boosting production as much as they can.

An email thread released Wednesday is raising more questions about whether lanes were closed on the George Washington Bridge as political payback. The emails indicate that top officials in New Jersey Gov. Chris Christie's administration are involved in the closures — motivated more by politics than a traffic study, as originally claimed.

Defense Secretary Donald Rumsfeld announces a reduction in the number of U.S. troops in Iraq. Rumsfeld said the number of U.S. combat brigades in Iraq will be cut to 15 from 17. The top ground commander in Iraq, Gen. George Casey, also said he could advise further cuts in troop levels by spring.

A report issued Friday by the bipartisan Senate Intelligence Committee says claims that Iraq had weapons of mass destruction were "not supported by the underlying intelligence." The report blames the CIA for overstating the threat and criticizes outgoing CIA Director George Tenet for skewing advice to top policy makers. Hear NPR's Renee Montagne and NPR's Tom Gjelten.

The Los Alamos National Laboratory in New Mexico places 15 employees on mandatory leave as the FBI investigates the disappearance of two data storage devices containing classified information. The incident raises questions over the balance between protecting top secret research at the nuclear weapons lab and scientists who value working unhindered by elaborate security measures. NPR's David Kestenbaum reports.

A top U.S. government scientist who helped investigate deadly anthrax attacks in 2001 reportedly committed suicide as the federal probe shifted to him. Bruce Ivins, 62, was a bioresearcher at defense labs in Fort Detrick, Maryland.

A top State Department official wants to unleash the power of Twitter, Facebook and other services to crowdsource the fight to control the world's nuclear weapons.

Democrats say they won't accept Trump's offer of three-year protections for those under DACA and TPS in exchange for full funding of his border wall. Republicans say Democrats should accept the offer.

Belarus will hold presidential elections Sunday, and the current president, Alexander Lukashenko, is widely expected to win. The European Union and the United States accuse Lukashenko of crushing human rights, and warn of new punitive measures if the election is declared unfair.

The Beijing Games are just the latest winter sporting event to use nearly all human-made snow for competitions. Winter sports experts say this is just the new reality.