(8/11/20) “Leave it as it is,” Theodore Roosevelt reportedly declared when gazing across the Grand Canyon for the first time. “The ages have been at work on it and man can only mar it.” Roosevelt’s rallying cry signaled the beginning of a battle that still rages today. To write his latest book “Leave It As It Is: A Journey Through Theodore Roosevelt's American Wilderness,” bestselling author David Gessner set off on a road trip across America guided by Roosevelt’s crusading environmental legacy. Join us for a look at TR’s most enduring legacy—the national parks system—in this installment of Leonard Lopate at Large on WBAI.