WASHINGTON (AP) - An envelope addressed to Sen. Roger Wicker of Mississippi tested positive Tuesday for ricin, a potentially fatal poison, authorities said, heightening concerns about terrorism a day after a bombing killed three and left more than 170 injured at the Boston Marathon.
NEW YORK (AP) - Fox has pulled from websites a recent episode of "Family Guy" that depicts mass deaths at the Boston Marathon, and has no immediate plans to air it again.
LOS ANGELES (AP) - Frank Bank, who played oafish troublemaker Lumpy on the sitcom "Leave It to Beaver," has died. He was 71.
DALLAS (AP) - American Airlines grounded flights across the country Tuesday because of an outage of its main reservations system. Thousands of passengers were stranded at airports and on airplanes.
BOSTON (AP) - Federal agents zeroed in Tuesday on how the Boston Marathon bombing was carried out - with kitchen pressure cookers packed with explosives, nails and other lethal shrapnel - but said they still didn't know who did it and why.
GUANTANAMO BAY NAVAL BASE, Cuba (AP) - The top medical official at the Guantanamo Bay prison says five detainees were injured in the weekend clash with guards.
WASHINGTON (AP) - The Supreme Court is trying to sort out a wrenching adoption case involving a Native American child, a biological father who first renounced any interest in her and adoptive parents who were eventually ordered to hand her over to the father.
CHICAGO (AP) - Far-flung family members, co-workers and friends frantically used social media, cellphones and even a "people finder" website Monday to try to learn the fate of participants and spectators at the Boston Marathon, where three people were killed and dozens injured after a pair of bombs exploded near the finish line of one of the world's great races.
BOSTON (AP) - Massachusetts Gov. Deval Patrick says no unexploded bombs were found at the Boston Marathon. He says the only explosives were the ones that went off Monday.
MIAMI (AP) - Lined up in front of their dugouts, all wearing No. 42 on Jackie Robinson Day, the Washington Nationals and Miami Marlins stood for a moment of silence to honor bombing victims at the Boston Marathon.
OINT BASE ELMENDORF-RICHARDSON, Alaska (AP) - An Alaska-based military policeman will serve 16 years in prison and will be dishonorably discharged for selling military secrets to a Russian agent, who was an undercover FBI agent, a military panel decided Monday.
LONDON (AP) - With more than 30 marathons being held this weekend alone and big events on the horizon, officials around the world are boosting security efforts in the wake of the fatal bomb blasts that shook Boston's race.
BOSTON (AP) - FBI agents searched a suburban Boston apartment overnight and appealed to the public for amateur video and photos that might yield clues to who carried out the Boston Marathon bombing, while a doctor treating the wounded said one of the victims was maimed by what looked like ball bearings or BBs.
PYONGYANG, North Korea (AP) - North Korea quietly marked a second day of celebrations for its first leader's birthday and issued prickly new rhetoric Tuesday threatening retaliation for what it sees as provocations by South Korea and the United States, who have been watching closely for signs the North may go ahead with a suspected medium-range missile launch.
EL CAJON, Calif. (AP) - A San Diego County man has pleaded guilty to killing his 94-year-old neighbor with a hammer as she slept.
FLAGSTAFF, Ariz. (AP) - Hotter, drier conditions in the already drought-stricken Southwest are expected to further stress the region's water supply, threatening specialty crops and making forests more vulnerable to wildfires and tree-killing insects.
POINT REYES NATIONAL SEASHORE, Calif. (AP) - Three sea lions - including one nicknamed Hoppie, who was rescued from an almond orchard in Modesto - have been released back into the wild.
FAIRFIELD (AP) - A pilot who crashed and died while performing a stunt at a Northern California air show had recently passed a skills test that included his flying routines, the head of an air show trade association said.
SAN FRANCISCO (AP) - Water has flowed from Northern California's snow-capped peaks to the south's parched cities ever since the California Aqueduct was built in the 1960s. Now, amid one of the worst droughts in history, state officials are considering an audacious plan to send some of the water back uphill.
HESPERIA (AP) - Interstate 15 is expected to remain closed northeast of Los Angeles for up to two days after a fire erupted where a bridge is being constructed.
NEW YORK (AP) - There were stunners, snoozers and bummers at the Met Gala, the former led by Sarah Jessica Parker, Karolina Kurkova and Sarah Silverman in stunning princess ball gowns and the latter led by, well, many.
PRETORIA, South Africa (AP) - Oscar Pistorius was accused of making a "sinister" comment to a friend of Reeva Steenkamp in the courtroom Tuesday after his murder trial was adjourned for the day. Pistorius denied the allegation.
DONETSK, Ukraine (AP) - Ukrainian troops tightened a security cordon around a major insurgent-held eastern city Tuesday, but pro-Russia militia acted with impunity elsewhere in the turbulent region bordering Russia, surrounding a major Interior Ministry base.
SAUSALITO (AP) - A marine mammal rescue group said Monday it's seeing a record number of stranded sea lions and seals along the Northern and central California coast - some of whom appear to have been sickened by toxins and others weaned by their mothers earlier than usual.
CHARLESTON, Mo. (AP) - Cornealious "Mike" Anderson spent 13 years free from prison due to a clerical error, then nearly a year behind bars when the mistake was caught. On Monday, he walked out of a southeast Missouri courtroom a free man again - this time with no need to look over his shoulder.
ALEXANDRIA, Va. (AP) - Becky Domokos-Bays of Alexandria City Public Schools has served her students whole-grain pasta 20 times. Each time, she said, they rejected it.
WASHINGTON (AP) - Two years in, schools are having mixed success putting new healthier school lunch rules in place.
WASHINGTON (AP) - U.S. service firms grew last month at the fastest pace since August as new orders and sales grew, adding to evidence that the economy is picking up after a slow start to the year.
LOS ANGELES (AP) - The U.S. Supreme Court declined Monday to hear an appeal by Los Angeles County contesting a ruling that held it liable for storm water pollution.
CLARKSBURG, W.Va. (AP) - Booming production of oil and natural gas has exacted a little-known price on some of the nation's roads, contributing to a spike in traffic fatalities in states where many streets and highways are choked with large trucks and heavy drilling equipment.