From the Wires

RadioShack to close 1,100 stores

Bloomberg: The electronics chain's shares slumped the most in more than four months.

Bill Gates regains spot as world's richest person

BBC: The Microsoft founder's total net worth was estimated at $76 billion.

West scrambles on Ukraine as Russia tightens grip in Crimea

New York Times: Western nations sought a political and economic response to the crisis in Ukraine.

Mt. Gox files for bankruptcy

Reuters: The world's largest bitcoin exchange filed for bankruptcy protection in Japan.

Ukrainian ex-leader vows to fight back

BBC: Viktor Yanukovych promised to to fight for Ukraine in his first public appearance since being ousted as president.

Michelle Obama promotes food label overhaul

BBC: The First Lady unveiled plans for new nutrition labels on U.S. food packages.

NASA discovers planets outside of solar system

Forbes: NASA's Kepler mission uncovered 715 new planets circling 305 stars.

Bitcoin on verge of collapse

L.A. Times: The sudden closure of Mt. Gox, the world's largest virtual currency exchange, triggered a massive sell-off.

Toddler obesity rate plummets

BBC: A national study has found the obesity rate among young children has fallen 43% since 2003-2004.

President Obama warns of U.S. Afghan pullout

BBC: President Barack Obama warned Afghanistan's Hamid Karzai that the United States may pull all troops from his country by the end of 2014.

Bitcoin-trading website disappears

CNN: Mt. Gox was taken offline, putting the millions of dollars invested in the digital currency at risk.

Pentagon plans to downsize U.S. Army

BBC: Defense Secretary Chuck Hagel reported plans to eliminate an entire class of Air Force attack jets.

Netflix reaches agreement with Comcast

CNET: The video-rental company will pay Comcast for direct access to its broadband network.