The Al Shabab movement sought foreign reinforcement two days after the US killed a fighter believed to have forged ties with Al Qaeda.
The FBI crime report, released Monday, shows murder and rape are down dramatically. But data on property crimes are inconclusive.
But many also see Islam as a violent religion, according to a Pew Forum survey.
Some of America's fastest-growing cities were the last to slip into the recession. Now they are hoping to harness their momentum and slingshot their way out of it. New Orleans, Louisiana topped the list in percentage terms, reflecting continued rebuilding after hurricane Katrina.
Vacationing volunteers leave the beaten path for a hands-on experience in coastal studies.
The US Attorney's Office and the FBI are looking into allegations of roaming 'people hunters' targeting blacks in the floods and chaos of four years ago.