Suspected Taliban militants attacked a ceremony attended by the Afghan president, unleashing automatic weapons fire that sent foreign dignitaries and senior government members running for cover. Three people were killed and eight others wounded. Read more…

Democratic presidential candidate Barack Obama brushed aside a challenge from Hillary Rodham Clinton to debate before the May 6 primaries in Indiana and North Carolina. Read more…

For more than a decade, soy and corn crops have been genetically modified to help farmers control weeds and bugs. Read more…