(I originally wrote the following post about freedom and sacrifice for inspireafire.com last year. I thought Memorial Day was an appropriate time to publish a slightly revised version.) Keith. That’s the name of my dad’s best boyhood friend. It’s also my brother’s name. My brother carries Keith’s name because Keith Kahlstorf was only allowed to carry it for a short time. The Vietnam War took his life when he was barely out of his teens. I’m sure he didn’t want to die. His family didn’t want him to die. My dad didn’t want him to die.  But as that…