NEW YORK-U.S. Treasury Secretary Timothy Geithner and Italian Prime Minister Silvio Berlusconi sought to support the battered euro on Wednesday, but the currency extended its decline on a report that China was reviewing its euro holdings. Geithner told Europeans that financial markets want to see euro zone countries put into action their $1 trillion standby package designed to stabilize the currency, and Berlusconi called on European partners to follow his lead and impose austerity to help solve the euro zone debt crisis...