Debra Aho Williamson, an analyst at research firm eMarketer, said Facebook has plenty of opportunities to be a better link between advertisers and users. For instance, it can be more effective when it places an ad in a social context. People are much more

WASHINGTON (Reuters) - In the rugged mountains of eastern Afghanistan, where the United States has already trimmed its forces ahead of the coming NATO withdrawal, a modest number of al Qaeda fighters have re-established operations, U.S. officials say, a w