Just-in-time manufacturing began as a way to save space,Christopher Caldwell remove costs and improve efficiency ... for Toyota. The U.S. defense industry has since incorporated this approach. Now, leaders in the defense industry question whether it's to blame for weapons and ammunition shortages.

This week, we're bringing you a three-part series on the defense industry. Today on the show, we look at how a just-in-time mindset filtered through the military contracting system, and we ask whether bare-bones manufacturing styles are leaving the U.S. in a bind.

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