Photographers Martha Rosler and Jamel Shabazz from the exhibition “Street Art, Street Life” discuss their work and the larger cultural context of street photography. Watch now.

* Transition of Power as President Barack Obama takes office
* World reactions to the U.S. inauguration
* From Obama’s African roots to the White House
* The Obama Presidency: a vision of inspiration and expectation
Watch.

Charlie Rose has a discussion with the new White House Chief of Staff Rahm Emanuel on why he took the job and how he plans to get it done. He is probably best known for his experience as a top adviser to President Bill Clinton and Congressional leader, and for his brother, Ari Emanuel, a [...]

Take a trip to the New Museum of Contemporary Art for a show called “To Be Someone”, through Jan. 25th, featuring the colorful, witty work of NY-based artist Mary Heilmann. First a ceramicist, then a sculptor, Heilmann turned to painting in the 1970s. Watch profile.

Experts also appraise a 1956 signed photo of 10-year-old, posed between baseball Hall of Famers Jackie Robinson and Roy Campanella, valued at $6,000, in Hour 3 of Antiques Roadshow from Palm Springs, California. Watch all appraisals from this episode.

President Obama’s inauguration took place the day after the nation honored Reverend Martin Luther King Jr., and religious leaders are among those who see ties between Obama’s election and King’s vision for America. Many Americans across racial and religious lines see Obama’s inauguration as one key fulfillment of King’s dream. Watch. (Originally aired: 1/16/2009).

Make ‘Em Laugh (next installments tonight at 8:00 pm) also has a number of online exclusive videos. In the series “My Comedian Hero“: watch Whoopi Goldberg talk about Richard Pryor; Richard Belzer’s ode to Andy Kaufman; George Carlin opine about Lenny Bruce; and MANY more. Watch now.

….of famous, and not-so-famous moments. From why Seinfeld chose to end his famous show, to when Harpo Marx finally spoke on stage, to Lucille Ball facing down a rabid dog, and more….watch now!

As America looks to dramatically increase its use of renewable energy, an inconvenient reality stands in the way: the need to upgrade the country’s antiquated electricity grid. NOW travels to California, the state with the most ambitious clean energy plan in the nation. Watch.

Governor Arnold Schwarzenegger in California has put forth a dramatic and controversial program to slash carbon dioxide emissions and promote energy efficiency. NOVA explores the pros and cons of California’s bold approach, which could be adopted nationwide. Watch now.