Obama: "There will be costs" if Russia moves troops into Ukraine
Any violation of Ukraine's sovereignty would be "deeply destabilizing," Obama warns
World
U.S. to Russia: "Intervention would be a grave mistake"
President says there will be costs to any Russian military intervention in Ukraine
Photos of the week
The best images from the week's news, Feb. 21- Feb. 28, 2014
Cuba cigar festival features unusal long-ash contest
More than 450 stogie aficionados in Havana compete to see who could create the longest unbroken ash
Egypt army "AIDS detector" instead finds ridicule
Military leaders mocked after chief army engineer claims "miraculous" set of devices that detect and cure AIDS and other viruses
Tiny, rare hippo born in England
Winnie, a rare pygmy hippo, born into special breeding program at Bristol Zoo Gardens in Bristol, England
Clashes in Crimea
Tensions in Ukraine spread to the Crimean peninsula
Will webcam spying report change debate over monitoring programs?
Former CIA analyst says report of British intelligence eavesdropping on Yahoo users raises same questions as NSA storing bulk phone, email data
Ukraine accuses Russian troops of blocking off airports
Top security official says airports in strategic Crimea region still under Ukrainian control after interior minister said Russians invaded
Security camera footage shows deadly blast in Colombia
Newly released video shows unidentified individual leaving bag containing explosive device on supermarket counter before it detonated
Mt. Gox bitcoin exchange files for bankruptcy in Japan
CEO Mark Karpeles takes humble bow before Tokyo media, says weakness in exchange system behind huge loss of virtual currency
Fears of a divided Ukraine rise as pro-Russia demonstrators storm Crimean parliament
New prime minister says Crimea will remain part of Ukraine, while U.S. backs Kiev government and warns Russia against intervening
UK spies reportedly intercept webcam pics, nudity
The Guardian reports that British intelligence has been stealing sensitive images by intercepting video chats in an effort codenamed OPTIC NERVE
U.S. on Ukraine: "Time for very cool, wise leadership"
Defense Secretary Chuck Hagel urges Russia not to take action as ousted leader's ally scrambles fighter jets to patrol border
Demonstrators demand release of Al Jazeera journalists
Rallies are being held around the world in support of journalists being held in Egypt, but organizers say their message applies to other nations
Hurricane Isaias threatens Gulf Coast with rain, flooding. See its path.
Interactive
These documents tell the story of the Cornell rape allegations
Fort Hood shooter's execution will be livestreamed, Pentagon says
Live
Trump promises not to resume Iran strikes before midterm elections
First on CBS
Trump aide's daughter pictured with pro-Russia politician
Curtis Flowers, wrongfully convicted man who was on death row, dies at 56
Arizona congressional candidate reports rape while repairing campaign signs
USS Lincoln docks in San Diego, returning home for first time in 321 days
