David B. suggested a video that he called a Blinding Flash of the Obvious: Splitting Wood In A Tire.
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Mark L. spotted this: The SAS Survival Guide App for the iPhone.
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Nano ‘tea bag’ purifies water. (Thanks to “16R” for the link.)
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F.J. was the first of several SurvivalBloggers to send me this: Floods Stir Social Unrest in Pakistan