Navistar responds to letter from Carl Icahn

(Sept. 10, 2012) -- "Navistar maintains an ongoing dialogue with its shareholders, and appreciates their input and views. As such, after a year of dialogue, we are extremely disappointed that Mr. Icahn has chosen to pursue his unproductive tactics of threats, attacks, and disruption rather than continuing constructive engagement, particularly at this important time for Navistar."