Stephen Walker, director of 'A Boy Called Alex', talks about the cooperation he received from Alex's family while filming.
The documentary follows Alex Stobbs, a musical prodigy, as he embarks on his dream to conduct Bach's epic choral work, the Magnificat at his school Eton College.
Diagnosed with cystic fibrosis at birth, Alex has an increasingly difficult struggle to achieve his goal, but meets his challenge with remarkable energy and determination.
