People in America are angry. A company is building a $3.8 billion oil pipeline. The Sioux people have lived on the land for thousands of years. The Sioux are Native Americans. People say the pipeline will make the water dirty. It will also damage historic Sioux sites. A company from Texas owns the pipeline. It is almost finished.

The protestors are "water protectors". They include retired soldiers and sailors. They built shelters to keep people warm in the winter. There has been trouble between the protestors and police. Someone said the protestors were "frightening". A protestor said they would protest peacefully. They don't like the word 'protest'."