Yahoo has been hiring hotshot journalists to boost its news cred, and Monday's addition of Katie Couric could help with the company's efforts to reinvigorate itself. But it has to get the content just right. The Internet company confirmed Monday it hired TV news anchor Katie Couric to lead its growing in-house news operation. She follows several other big-name grabs like The New York Times' technology columnist David Pogue and the Times' deputy news editor Megan Liberman.