Investors are all in a lather over fears that government budget cuts will curtail defense spending, and crush Lockheed Martin (LMT -0.20%) stock -- among others. Fool contributor Rich Smith can't say for sure what fate will bring to other firms operating in this space, but he knows one thing: As the company experiments with finding revenue in everything from civilian airplanes to gas-filled dirigibles to green energy and water desalinization, Lockheed Martin stock will do just fine.

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