FILE - In this April 24, 2012 file photo, NBC News anchor Brian Williams attends the TIME 100 gala, celebrating the 100 most influential people in the world, in New York. Williams will be off the air for a few weeks soon for surgery to replace a knee that was damaged in a high school football game decades ago. (AP Photo/Evan Agostini, File)
NBC Nightly News anchor Brian Williams is recovering from knee surgery and talked about his experiences as he rehabilitates.
"My old knee felt like a bowl of burnt rice crispies every step I took and I couldn't go up a flight of stairs. Now I'm learning stairs, I'm learning how to go up a flight of stairs on this new thing," Williams said his latest interview.
Williams thanked his medical team for a successful surgery and praised the physical therapy that he's been getting.
"Without physical therapy, none of this could happen," he said.
He also said he was a "motivated patient."
Williams is seen walking gingerly with a cane in the interview.
He admits that when he loses motivation or when physical therapy gets difficult, he reads an excerpt from a Medal of Honor coffee table book chronicling the stories of the prize's recipients to reinvigorate him.
"These guys are my motivational tool because I believe in them," Williams said. "They're my North stars."