Life expectancy is at an all-time high. Americans are living longer, working longer and staying active longer.  It is fundamentally changing the nature of who makes up the workforce.  We talk with two prominent examples: John Paul Stevens, whose passion is the law and who last year at age 90, retired from the intellectually demanding job of Associate Justice of the U.S. Supreme Court and Betty White, who will be celebrating her 90th birthday in a matter of months but continues to enjoy a renaissance in her show business career – a hit TV show, commercials and as the highest-rated guest host last season on Saturday Night Live (not to mention a new book, her involvement in animal welfare causes and as spokesperson for AARP).

Betty White is a force of nature.  At 89, she has a hit TV series, has just written her sixth book, If You Ask Me (And of Course You Won’t) and remains deeply engaged in animal welfare issues. And oh yes, White says she sleeps a few hours a night.

See also: Justice John Paul Stevens discusses longevity.

Just before kicking off her book tour, she invited Inside E Street's Lark McCarthy to Long Beach, California to the SPCA/LA’s P.D. Pitchford Companion Animal Village & Education Center to discuss longevity, her unstoppable career and lifelong love of animals.