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xkcd #3173: Satellite Imagery
(imgs.xkcd.com)
Title text:
Every weekend I take an ATV out into the desert and spend a day tracing a faint "(C) GOOGLE 2009" watermark across the landscape.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3173/
Pft. Ahaha!
"We have no idea where they're hiding the real program. This is clearly just the decoy we were meant to find!"
"How can you be sure?"
"It's obvious: There would be no point if this was all they had."