The Minerals Management Service (MMS) has revised its assessments of the undiscovered oil and gas resource potential of the Alaska Outer Continental Shelf (OCS). These assessments provide current estimates of both technically and economically recoverable resources to assist with the development of a new 5-Year Oil and Gas Leasing Program (2007 through 2012). Analysis performed for the 5-Year Program weighs the positive economic value of marketable oil and gas against possible environmental consequences of development and production.