Couric debuts on CBS tonight

Katie Couric will make history tonight as she becomes the first female solo anchor of a network news broadcast. The UVA alumna debuts at 6:30pm on the CBS Evening News, joining a network that has been home to journalism heavyweights Edward R. Murrow and Walter Cronkite.

CBS is gambling that the 15-year veteran of NBC's Today show can boost ratings and attract additional advertising dollars. Couric has her work cut out for her– CBS trails both NBC and ABC in the evening ratings.

Before her first broadcast, Couric has acquired a revamped set, a rebuilt newsroom, and new theme music written by Oscar-winning composer James Horner (famous for his work on Titanic).

Couric has even found a place in the blogosphere, posting to her new blog "Couric and Co." on CBSnews.com.

In the past few decades, network evening news shows have lost nearly half their viewers, and the average age of viewers nears 60. Couric will have to cope with these long-term trends and critics who see her as a "fluff" journalist because of her background on Today. Only time will tell if Couric can make an impact.