Description:Following a series of high-profile hacks, the FBI is set to outline threats facing U.S. cyber space. Thursday's (February 28) briefing in San Francisco comes amid a number of recent attacks to businesses. Burger King and Jeep had Twitter accounts hit, while the New York Times says a Chinese military unit hacked its computers. Paul Viollis from Risk Control Strategies says cyber criminals are getting smarter - and it's time for companies to start fighting back.(1:36)