** ADVANCE FOR WEEKEND EDITONS SEPT. 1-2 ** Keith Lambert, mayor of the small Colorado mountain community of Rifle, sits on a bench along the main street through the town in this photograph taken on Thursday, April 19, 2007. Rifle, which is one of the epicenters of natural gas exploration efforts in the intermountain West, is struggling with the changes brought on with an influx of new residents who have altered the makeup of the rural region. (AP Photo/Judith Kohler)