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A satellite with a climate solutions mission blasted off on a SpaceX rocket Monday. It's on a mission to detect planet-heating methane pollution from the oil and gas sector.

The idea behind "clean coal" is technology that would capture for reuse most of the carbon dioxide emitted by coal-burning power plants. Entrepreneurs aim to use similar tech to clean natural gas.

Last year, the number of homeless U.S. veterans on a given night fell 12 percent from the year before. But tens of thousands were still on the streets, and more could soon join them as troops return home. President Obama has vowed to end veterans' homelessness by 2015.

Researchers at the Department of Veterans Affairs warn that crucial medical research is in jeopardy unless the Trump administration reverses course on cuts.

The first high-speed Amtrak trains outside of the Northeast Corridor are racing through parts of Michigan at 110 mph. But President Obama's ambitious high-speed rail initiative is otherwise in a slowdown mode, since lawmakers and some governors have not embraced the program.

Hollywood actors are on strike, but the union is allowing some productions to continue. That's created some disagreement in the rank and file.

Hollywood actors are on strike, but the union is allowing some productions to continue. That's created some disagreement in the rank and file.

Parts of the massive Okefenokee Swamp are a wildlife refuge. Georgia is on the cusp of permitting a titanium dioxide mine next to it, prompting the federal government to invoke federal water rights.

First intended as an entrance for social events, the East Wing became the first lady's office space. Historians say the shift was a key part of professionalizing staff for the president's wife.

Economists say the black unemployment rate is so high — 15.5 percent — for a number of reasons, like less education, job discrimination and huge slashes in public-sector jobs. Blacks make up about 10 percent of the full-time working population but 27 percent of the long-term unemployed, an NPR/Kaiser survey found.