Greenspan's First Interview Tonight on 60 Minutes

(CBS) - Former Federal Reserve Chairman Alan Greenspan admits he "didn't really get it" that the subprime lending trend was significant enough to hurt the economy until very late 2005, but still defends his lowering of interest rates from 2001 until 2004 that critics say caused the crisis in the first place.

Greenspan, who led the U.S. Federal Reserve Bank through 18 years and 4 presidents, speaks to 60 Minutes correspondent Lesley Stahl in his first major interview tonight (Sunday), at 7 p.m. EST.