Steve L. recommended a recent Survival Podcast episode: An Interview with Chris Martenson.
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Jamieson sent this: Solar Flare to paralyse Earth in 2013. See also this BBC report: Are solar flares a real threat? (Thanks to R.L. for that link.)
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RBS and several other readers sent this: O Rings for Accuracy on AR15, M16 and AK47
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More on the risk of solar flares: Astronomer fears apocalypse 2012 is true