Global: G20's Mantra Covers Big Differences    By Gordon Platt
Comic relief: G20 leaders laugh despite deficit deadlock  At
last month's Seoul summit of the G20—or the G19+1, as one senior
Asian central bank official recently dubbed it—the US was
isolated from the other world economic powers by the Federal
Reserve's decision to print hundreds of billions of dollars to
boost the struggling US economy. Printing more dollars is
undermining the greenback, critics claim—a view that became all
the more convincing after former Fed chairman Alan Greenspan
said: "America is pursuing a policy of currency weakening."  If
true, this is the same type of currency manipulation that the US
accuses China of committing by pegging the undervalued yuan to
the sinking dollar. US Treasury secretary Timothy Geithner, who
has responsibility for the administration's dollar policy,
responded: "We will never seek to weaken our currency as a tool
to gain competitive advantage or to grow the economy."  This
declaration sounded similar