UC Santa Barbara students attend a candlelight vigil following Friday's series of drive-by shootings that left 7 people dead in the Isla Vista section of Santa Barbara May 24, 2014.
Thirteen inmates were killed and 65 others injured in a prison riot Saturday in the central Mexican state of San Luis Potosi.
President Barack Obama joked Saturday about his plans for a radical second-term evolution from "strapping young Muslim Socialist" to retiree golfer.
Lightening caused several oil tankers at an oil storage facility to explode in the US state of Texas on Saturday.
A Mississippi martial arts instructor was charged on Saturday with attempting to use a biological weapon after a ricin-laced letter was sent to US President Barack Obama earlier this month.
Another Mississippi man was arrested over ricin-laced letter sent to US President Barack Obama and two others, the US authorities confirmed Saturday.
The United States denied making any effort to destabilize the Venezuelan government, and called an American arrested in the South American nation "a private US citizen".
A piece of landing gear believed to be from one of the commercial airplanes that crashed into the World Trade Center on Sept 11, 2001, has been discovered.
Venezuelan President Nicolas Maduro Friday warned that anyone found sabotaging the nation's electricity network will face "the most severe penalties."
The surviving suspect in last week's Boston Marathon bombing was moved to a prison medical center outside Boston on Friday.
The focus of the FBI's investigation of the Boston Marathon bombings has shifted from identification and apprehension of suspects to piecing together details of the deadly plot.
Many Chinese travelers have said they find security screenings at US airports to be excessive, particularly the removal of shoes and belts.
The wounded suspect of Boston Marathon Bombing has been transferred from a hospital to a prison hospital, the US Marshals Service said Friday.