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.
People photograph the full moon as it rises over the skyline of New York City near 42nd Street (C), as seen across the Hudson River in Weehawken, New Jersey April 25, 2013.
Obama joined his living predecessors Thursday morning to dedicate the George W.Bush Presidential Library.
The two Boston bombing suspects had intended to come to New York to detonate bombs in Time Square, New York Mayor Michael Bloomberg said on Thursday.
Washington would like to strengthen communication with Beijing on key issues, a visiting high-level US diplomat said on Thursday.
Students at a school in Houston sent hand-made cards to China's earthquake-stricken Sichuan.
The two bombs that went off at the Boston Marathon were detonated with the kind of remote device used to control a toy car.
The LAX AirEx is a two-hour long simulated aircraft disaster with over 100 volunteers in moulage, role-playing as accident victims and is designed to test LAX's Emergency Response Plan.
An FBI-led Joint Terrorism Task Force in Boston was alerted when one of the two brothers who later allegedly carried out the Boston Marathon bombings traveled to Russia.
Two US officials say the surviving suspect in the Boston bombings was unarmed when police captured him hiding inside a boat in a neighborhood back yard.
Federal law enforcement agencies investigating ricin-laced letters sent to Obama broadened their search for clues on Wednesday.
Four children were killed when a fire swept through a mobile house on Wednesday afternoon in US state of South Carolina, local media reported.
Cabinet members, governors and top military officers are among the guests from the United States who have met with Chinese President Xi Jinping.