Article Photos: US, Mexico sign rules on sharing Colorado River 1/1

  FILE - In this Wednesday, March 5, 2008 file photo, water levels at the Colorado River's Horseshoe Bend begin to rise along the beaches just hours after the Glen Canyon Dam jet tubes began releasing water, in Page, Ariz. Drought, climate change and an increasing population in the West are pushing the Colorado River basin toward deep trouble in the coming decades, scientists say. (AP Photo/Matt York)