Martha Raddatz has interviewed world leaders and four-star generals, walked among the injured after the devastating earthquake in Haiti, and flown in an F15 fighter jet over Afghanistan, but Thursday night she faces a new challenge: moderating the debate between Vice President Joe Biden and Republican vice presidential nominee Paul Ryan.

Read more http://feeds.abcnews.com/click.phdo?i=734f0a1980fa01d3c192c52d526db473