Wow great job NASA you repeated yourselves. Here these Articles should go with your other findings of water on Mars.
2009 http://www.bbc.com/news/science-environment-32287609
2012 http://www.inquisitr.com/345875/new-mars-discovery-curiosity-rover-finds-evidence-of-water-stream/
Even the Aerial images have shown signs of it long ago.
Here is a theory though might not be true.
Mars has more Salt in the water than in these forums.
English
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Those are evidence of dried up streams. They actually found water. Different yet the same.
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To be fair your articles reference historical evidence of water where the current announcement has discovered current evidence of liquid water.