These protesters in Washington, D.C., are on a mission to stop the Keystone XL pipeline.<br/> <br />The pipeline would connect Canada's oil sands region to refineries on the U.S. Gulf Coast.<br/> <br />Saturday's event ends a week of protests by the Cowboy and Indian Alliance.<br/> <br />(SOUNDBITE) (English) PROTESTER IRVING GAITHER SAYING:<br/> <br />"I think that we're going up against a lot of people who have a lot of money. What we have to do is we have to align so I like the idea that the cowboys and the Indians have a mutual problem and they are aligning together to talk about it and to get their voice out there."<br/> <br />The protesters say the pipeline will hurt the environment and worsen climate change.<br/> <br />President Barack Obama has said he will have the final say on whether to greenlight the project.<br/> <br />(SOUNDBITE) (English) PROTESTER VICKI RYDER SAYING:<br/> <br />"I've come to stand in support of our native peoples who are trying to keep the Earth safe and free from pollutants for our grandchil
