All Things Considered

Garth Knox was born to play the viola. As a youngster, he already had two sisters who played violin and a brother who played cello. "So for the family string quartet," Knox says, "it was very clear from the start which instrument I would play."

Fifty years ago, Johnny Carson became the host of The Tonight Show. During his 30 years as host, he reached a nightly audience of 15 million people and became one of the most trusted and famous men in America.

But Carson was intensely private off-screen, and very few people — including members of his own family--really knew him. Documentary filmmaker Peter Jones wanted to try and change that. Once a year, for 15 years, Jones sent Carson a letter, begging him for permission to make a documentary on his life.

In 2002, Rafe Sagarin was working in Washington, D.C., as a science adviser. It wasn't long after the Sept. 11 attacks, and Sagarin started paying attention to the security measures on Capitol Hill.

"I'd watch these other Capitol Hill staffers and I noticed that they'd just put their hand over the keys in their pockets so they didn't have to waste 30 seconds putting it on the conveyer belt though the security screening — and that didn't set off the alarm when they did that," Sagarin tells host of weekend All Things Considered Guy Raz.

Weekends on All Things Considered continues its "Why Music Matters" series with stories of music fans, told in their own words. Today's story is about Amy O'Neal, a choreographer who took on the challenge of dancing in complete silence.