Police in North Dakota - where thousands of people are protesting a controversial pipeline project - have defended their use of rubber bullets and water canon.
Climate activists and Native Americans at Standing Rock are campaigning against the €3.5bn project.
Thousands of military veterans have pledged, if necessary, to act as human shields at the camp.
Protesters are worried the pipeline could contaminate the water supply: We're here to protect our water.
"We have made a relationship with all our sacred elements. Standing Rock is home now, that’s how much it means to me. This is where everybody had come to say enough is enough.
"In the future, with what the government is doing there will be no further generations so we are fighting till the end."