Robert Glenn KETCHUM.

This article offers information on the portfolio of photographer Robert Glenn Ketchum. Through the use of his images, several conservation laws were pushed through the U.S. Congress. His book "The Tongass: Alaska's Vanishing Rain Forest" was distributed by lobbyists to Senate and House members to convince the U.S. Congress to protect old-growth trees from logging. Other books by Ketchum include "Rivers of Life: Southwest Alaska, the Last Great Salmon Fishery" and "Wood-Tikchik: Alaska's Largest State Park."