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It is the responsibility of the President to articulate a new plan for Iraq that makes it clear to the Iraqis that they must defend their own streets and their own security , a plan that promotes stability in the region , and that allows us to responsibly redeploy American forces . Nevertheless , if the aim is to achieve a particular target size of population , it is insufficient to merely state a number . Two complementary forms of event interaction , asynchronous and synchronous concurrency , are formally described that allow to automatically compute complex joint effects of concurrent actions if possible , but also to explicitly specify combined effects that are not derivable from the single events . The participants affirmed that each member of a community needs to contribute for it to truly prosper . When a new group submits a name and device , the Herald should inform the Seneschal ( who might know , from officers ' reports , whether the group is viable or liable to soon disband ) .