Random?

Tom starts today's tour with the Smithsonian's photograph collection and learns the story behind some of Ansel Adams' classic pictures. Then he visits the National Zoo to see how the animals are trained to make it easier to feed and give them their periodic physical exams. Next he sees the wildly ornate piano that Teddy Roosevelt acquired for the White House. Finally, for those animals that didn't survive to star in the National Zoo, Tom checks out the cryogenic storage facility for their DNA.