July 2012 has broken the old record set in 1936 during the Dust Bowl era to become the hottest month ever in the US, scientists say.
The Curiosity Mars rover uses its navigation cameras for the first time, capturing images of its shadow on the ground and views of the horizon.
Adverts for apps will feature in Facebook's news feed on mobile devices as it seeks to counter a decline in visits via the web.
A death-row inmate is executed in Texas after the US Supreme Court rejected arguments he should be ineligible for execution because of his low IQ.
The security firm formerly known as Blackwater agrees to pay a $7.5m (£4.8m) fine to settle US federal charges related to arms trafficking.
The New York police subpoena Twitter to force it to identify a user who threatened to shoot up Mike Tyson's one-man Broadway show.
Jared Loughner admits killing six people in a shooting rampage in Tucson, Arizona, as a judge finds him mentally fit to enter a plea.
US homeowners stuck in houses that may never recover value
US death row search for alternative to triple-drug cocktail
How do you make Bourne work without Matt Damon?
US temple shooter: From family camping trips to hate-filled bigotry
Rating how US states combat the scourge of human trafficking
As US manufacturing jobs dry up, so do living standards
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