SunSpot505 writes: "MSNBC's website appears to be suffering from a DNS poison attack. Going to www.msnbc.com appears to redirect to the BBC main page. I couldn't find any reports about this anywhere through google searching. I'm sure someone somewhere is scrambling."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"