[Dakota Access Pipeline - Why the protests? Is the water threat real]

I hear now that the national guard has been deployed to region.  I just don't understand why the media is not taking about anything that is going on. 

[Dakota Access Pipeline - Why the protests? Is the water threat real]

Dakota Access Pipeline Company Attacks Native American #nodapl Protesters with Dogs and Pepper Spray - a Democracy Now! Special Report on #StandingRock. More: ow.ly/c9Jc303SkTI

 

I came across this link a few days ago and I was hoping to get some clearification on what is going on.

 

From what I know so far, the issue appears to be that an oil company is trying to run an oil pipe line through Native American land.

 

I see that the media is claiming that the dispute is over clean drinking water that may be affected. I have seem other sources claiming that the dispute is more about constructing over sacret land.

 

Any thoughts?..