Governors from 18 U.S. states and two territories are calling on Congress to halt federal climate rules they say could be devastating to the economy. Govs. Haley Barbour (R-Miss.) and Joe Manchin (D-W.Va.) were the lead signatories of a letter sent yesterday to House and Senate leaders, saying they are "gravely concerned" about U.S. EPA's efforts to impose greenhouse gas regulations. Go to story #1