Mike Tidwell (right) from the Chesapeake Climate Action Network addresses a rally outside the Ronald Reagan Building in Washington on Oct., 7, 2011, against the proposed Keystone XL pipeline. (Associated Press)

Photo by: Pablo Martinez Monsivais

Mike Tidwell (right) from the Chesapeake Climate Action Network addresses a rally outside the Ronald Reagan Building in Washington on Oct., 7, 2011, against the proposed Keystone XL pipeline. (Associated Press)