Former Defense Secretary Donald Rumsfeld famously said $2.3 trillion in Pentagon spending could not be accounted for. That was before the wars in Iraq and Afghanistan. Now it turns out the Pentagon can't accurately pay its soldiers in the civilian reserve or on active duty, including those wounded in combat. Sometimes they get too much, sometimes too little, and the consequences run from the irritating to the tragic. Scot Paltrow is special enterprise correspondent for Reuters News Service, reporting a series on Defense Department accounting.