http://www.huffingtonpost.com/2009/03/17/us-injecting-billions-int_n_175454.html

For more than a year, the U.S. Federal Reserve System has been increasingly acting as the world's central bank, injecting hundreds of billions of dollars into foreign government treasuries in an effort to increase liquidity in those countries.

The foreign central banks have used the U.S. currency to bail out financial institutions within their borders. The Fed program links its balance sheet directly to the fates of foreign central banks at a time when they're on the ropes.

The program has so far gone unreported in the mainstream media and is a major expansion of Federal Reserve involvement in the global economy. It represents a stark break from the prior role of the Fed, moving it into territory more traditionally occupied by the International Monetary Fund (IMF).