How the Giving Pledge, Bill Gates and Warren Buffett's quest to get billionaires to donate half their wealth to charity, will impact philanthropy and the world's needy.
Some do it for tax breaks and public recognition. But happiness, rather than self-interest, is a prime motive.
Internal e-mails at Toyota suggest a reluctance to address sudden acceleration. The documents come to light at a time when Toyota is trying to rebuild its image.