McChrystal "really takes his finger and puts it in their eye, 'Deliver or this won't work, '" Woodward told CNN's "American Morning" on Monday.

CNN: Report: U.S. general calls for more troops in Afghanistan

"I don't know if it was that, " Woodward told The Associated Press.

NPR: Discovery Documentary Revisits Watergate Movie

Redford, who portrayed Woodward in the movie, said the writer later told him he didn't believe it was the actor on the phone and was worried about being set up.

NPR: Discovery Documentary Revisits Watergate Movie