NEW YORK (AP) - Facebook is set to unveil new, potentially lucrative advertising opportunities as a prelude to its initial public offering of stock. The idea is to lure big brands with the promise of effective, precisely targeted ads that reach the social network's nearly 850 million users.

WASHINGTON (AP) - Businesses facing a growing threat of cyberattacks against their websites will now have more tools to protect themselves and harden their Internet sites against hackers.