This is an extract from National Geographic´s Youtube channel. Long life to these amazing photographers and their unique and significant work.
"Who are National Geographic photographers? To honor 125 years of photography, we turn the (video) camera on our colleagues and get to know the people behind some of the most celebrated photographs in the world.
Visit http://proof.nationalgeographic.com for more interviews from this series, in which National Geographic photographers explore the power of photography and explain why this life of image-making suits them so well.
William Albert Allard
David Alan Harvey
PRODUCERS: Pamela Chen and Chad A. Stevens
ASSOCIATE PRODUCER: Elyse Lipman
PICTURE EDITOR: Ken Geiger
ASSOCIATE EDITOR: Kathryn Carlson
CAMERA AND SOUND: Spencer Millsap and Shannon Sanders
MUSIC: Tyler Strickland
EDITORS, UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
Chad A. Stevens
G. Ligaiya Romero
Carolyn Van Houten