The Mars rover Curiosity is exploring the surface of the Red Planet in the Gale Crater, and it is also tweeting about its mission. The rover has a distinct personality, albeit one made by the strokes on a keyboard from the Jet Propulsion Lab in Pasadena, Calif.
A Senate panel found last year that Goldman Sachs marketed four sets of complex mortgage securities to banks and other investors, but failed to tell clients the securities were very risky. The Justice Department said the "burden of proof to bring a criminal case" could not be met.
The slaying of six people at a Sikh temple by a gunman with ties to white supremacists has raised questions about the scope of domestic terrorism — and what law enforcement is doing to stop it.
Federal law enforcement agencies cracked down hard on homegrown extremists after the 1995 Oklahoma City bombing, which killed 168 people, including 19 children at a day care center. Many leaders went to prison, died or went bankrupt.
But in recent years, the spread of the Internet, the worsening economy and changing demographic patterns have been giving new voice to hate groups.