Now Playing: 08-30-13 Marketplace - The Yosemite economy

The 200-square-mile Rim Fire peels back the layers of the Sierra Nevadas’ economic ecology as the fire impacts timber sales, a tourist sector that ranges from camps and cottages to backpackers, and federal management of a huge area for the public’s benefit. A company called AdTrap is selling a white box about the size of a computer router, that, connected to your devices via WiFi (computers, tablets, smartphones) can block any ads. And finally, we look back at the week that was on Wall Street with the Weekly Wrap.