In the News: Lance Armstrong, Facebook Ad Exchange and more

Lance Armstrong denies new doping charges that could strip him of seven Tour de France titles.

Facebook prepares to launch real-time bidding for ads.

Skype starts interrupting video chats with advertising.

AIG is ready to use its own name again.

Barnes & Noble CEO reportedly settles shareholder lawsuit for $29 million.

Duran Duran announce first digital premiere on Facebook.

Elizabeth Arden acquires rights to Justin Bieber and Nicky Minaj fragrances.

JPMorgan CEO Jamie Dimon appears contrite but dodges hard questions in Senate Banking Committee hearing.

Saab: The auto brand that refuses to die.

Supervalu expands private label brand.

Twitter's expanded tweets brings more news and content to users' streams.

& Carly Rae Jepsen's Call Me Maybe hits #1 on the Billboard Hot 100.