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FILE - In a Sunday, Feb. 19, 2012 file photo, actress Betty White arrives at the premiere of the animated feature film "The Lorax" in Universal City, Calif. White is headed to Washington for a Thursday, May 17, 2012 visit. First stop is the Smithsonian Institution, followed by the National Zoo to see the pandas, harmonica-playing elephant and other animals. On Thursday, the 90-year-old actress visits the Smithsonian Associates, an educational division of the museum complex, to discuss her career and longtime passion for animals. She will be signing copies of her book, "Betty and Friends: My Life at the Zoo." (AP Photo/Dan Steinberg, File)

Associated Press
FILE - In a Sunday, Feb. 19, 2012 file photo, actress Betty White arrives at the premiere of the animated feature film "The Lorax" in Universal City, Calif. White is headed to Washington for a Thursday, May 17, 2012 visit. First stop is the Smithsonian Institution, followed by the National Zoo to see the pandas, harmonica-playing elephant and other animals. On Thursday, the 90-year-old actress visits the Smithsonian Associates, an educational division of the museum complex, to discuss her career and longtime passion for animals. She will be signing copies of her book, "Betty and Friends: My Life at the Zoo."   (AP Photo/Dan Steinberg, File)
FILE - In a Sunday, Feb. 19, 2012 file photo, actress Betty White arrives at the premiere of the animated feature film "The Lorax" in Universal City, Calif. White is headed to Washington for a Thursday, May 17, 2012 visit. First stop is the Smithsonian Institution, followed by the National Zoo to see the pandas, harmonica-playing elephant and other animals. On Thursday, the 90-year-old actress visits the Smithsonian Associates, an educational division of the museum complex, to discuss her career and longtime passion for animals. She will be signing copies of her book, "Betty and Friends: My Life at the Zoo." (AP Photo/Dan Steinberg, File)
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