#PIFs

1/. since 2021 is #PIFs 50th bday we should ALL revisit its political purpose & be reminded of what it takes to exert our independence & right to Development. It
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Great question from @Geopilot on this @pilliarscreatio post: why does the exhaust plume impinge on the aft portion of the Saturn-V first stage in the photo below? Let’s talk supersonic
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