Sure, it helps the US by driving up appetite for the USD and treasuries, forcing the world to pretend even longer that the US is the only safe harbor during a storm, and delaying inflation pressure. But it'll just as surely put the viability of the global financial system into question again, kill the fragile if real recovery and threatens the prolonged, worldwide deflationary spiral. Regardless, certainty includes countless lawsuits for BP and a higher cost for all deep-sea oil drillers, as well as huge economic and environmental damage to the gulf coast region.