News roundup: Yahoo targets youth market with $1.1 billion buy of Tumblr … A look at Facebook, one year after IPO … Many fliers willing to pony up for better seats, poll finds

The big deal: Yahoo is buying online blogging forum Tumblr for $1.1 billion as CEO Marissa Mayer tries to rejuvenate an Internet icon that has fallen behind the times. The deal announced this morning …