JUDY WOODRUFF:

Now a look at how the popular media and gossip site TMZ works, and how it's changing that business.

The site is often the leading destination of celebrity news and even notable national scandal. TMZ obtained the video of football running back Ray Rice knocking his then-fiancee unconscious in a casino elevator.

Before that, it released recordings of racist remarks made by Donald Sterling, who was, at the time, the owner of the Los Angeles Clippers.

"The New Yorker" magazine published an investigation of TMZ.

And Jeffrey Brown spoke with the writer, Nicholas Schmidle, earlier this week.