** ADVANCE FOR MONDAY, JULY 23--FILE **The sun rises over the mountains east of Moosehead Lake, in this May 17, 2004, file photo, in this view from the summit of Big Moose Mountain near Greenville, Maine. Henry David Thoreau made his third and final trip to Maine's North Woods 150 years ago, traveling waterways and forests that shaped so many of his ideas about nature. (AP Photo/Robert F. Bukaty/FILE)