US Federal Reserve to buy more debt to stimulate economy
13 September 2012 Last updated at 22:41 BST
The current state of the US economy has prompted a significant intervention by the Federal Reserve.
The central bank has announced a series of aggressive measures to stimulate the economy and tackle unemployment, including buying $40bn worth of mortgage debt every month until the outlook for jobs improves.
The economy is a pivotal issue in this year's US presidential election.
Mark Mardell reports.