Marta Gonzalez was a ballerina for years in New York City. After she was diagnosed with Alzheimer's, it limited her ability to move and communicate. Someone played the music for Swan Lake for her — and just watch how it all came back to her.

Marta Gonzalez was a ballerina for years in New York City. After she was diagnosed with Alzheimer's, it limited her ability to move and communicate. Someone played the music for Swan Lake for her — and just watch how it all came back to her.