Inside the secret operation to exhume Frédéric Chopin's heart

"Where your treasure is, there your heart will be also," reads a placard near where the heart of composer Frédéric Chopin lies. It is sealed in a glass jar and concealed by a stone pillar. In Poland, where the organ has rested off and on for a century and a half, the site is a piece of a nation's soul; Chopin's music may belong to the ages, but Poland has claimed the half-Polish composer and pianist as its own.