But the idea without evidence is meaningless. Do you have evidence that they are hiding something? These guys have been studying Mars for years, some even for decades now. Do you know what information they have accompanying that picture? What local time was it? What was the pressure at that site at that time? What was the temperature doing at that time? in short, can you show us that the experts whose job it is to actually study the stuff coming back from the rovers had any reason to believe there might have been liquid water there, beyond what your eyes tell you?

Handwaving about the general case does not a coherent theory make. Bring some specifics to your argument.

No, as Jay already said, the birth of a conspiracy theory. If there is a real conspiracy it was born a long time ago.

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"The very powerful and the very stupid have one thing in common: They don't alter their views to fit the facts, they alter the facts to fit their views." The Doctor, Doctor Who: The Face of Evil.