Former Fed Chairman Alan Greenspan speaks extensively to Maria Bartiromo

CNBC, First in Business Worldwide, presents an extensive interview with former Federal Reserve Chairman Alan Greenspan-arguably the most important central banker of modern times. In excerpts of the interview with CNBC's Maria Bartiromo, which will air through the day on CNBC, Greenspan discusses the state of the world economy, whether interest rates were kept too low for too long, the state of the subprime, and presidential politics.