John Scalzi's "The President's Brain is Missing" (short story, satire, free): Ultimate in VIP security!
Technical idea here is a variant of van Vogt's "The Purpose": technology exists to keep a man's heart far away from body, still letting the man live normally. Here, it's the brain - though it's not "kept away", strictly, in the sense of van Vogt's story.
Story summary.One morning, the personal physician of the US President finds the President's brain physically missing from his head, though he seems to be physically normal in observable ways! Alex Lipsyte of the Presidential staff will solve the mystery...
Fact sheet.First published: Tor.com, July 2010.
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Related: Stories of John Scalzi.