There have been a few of these run on EP over the years which have been very well received, so I thought I'd point everyone's attention to
StarShipSofa 292, which includes the most excellent (and award-winning) 'Sergeant Chip' by Bradley Denton. Even if you don't generally listen to SSS it's worth it to at least hear this story, which I found very effective and moving. Plus an excellent reading. It's a bit lengthy but that was OK with me personally because I ended up loving it so much. Go listen.