The dramatic drop in violence in Iraq is due in large part to a secret program the U.S. military has used to kill terrorists, according to a new book by Pulitzer Prize-winning journalist Bob Woodward.

Bob Woodward’s book, “The War Within: Secret White House History 2006-2008,” came out Monday.

The program — which Woodward compares to the World War II era Manhattan Project that developed the atomic bomb — must remain secret for now or it would “get people killed,” Woodward said Monday on CNN’s Larry King Live.

“It is a wonderful example of American ingenuity solving a problem in war, as we often have,” Woodward said.

http://edition.cnn.com/2008/WORLD/meast/09/09/iraq.secret/index.html