WASHINGTON (MarketWatch) -- The Treasury and the Federal Deposit Insurance Corp. are working with the Federal Reserve and Fannie Mae to prevent millions of home foreclosures, Treasury Secretary Henry Paulson said Tuesday in an exclusive interview on "Charlie Rose" on PBS airing Tuesday night, according to a transcript of the interview. Paulson said the Treasury is readying plans to buy troubled mortgage assets from banks and other investors. "There is clearly more that can be done, needs to be done," he said. "We are looking in the millions. And we need to do everything we can to minimize that," Paulson said. The actions by the FDIC to guarantee bank debts are already working, he said. "The credit freeze is beginning to melt."