DigiKnow? – Digital Knowledge

SEOUL, South Korea – North Korea vowed to retaliate if punitive U.N. sanctions are imposed for its latest nuclear test, and U.S. officials said there are new signs Pyongyang may be planning more long-range missile launches.

TOKYO – Google has long been the king of search, dominating rivals including Yahoo Inc. and Microsoft Corp. But it increasingly sees social networks such as Facebook as challengers to its search engine, a company official said Monday.