In collaboration with Louisiana Public Broadcasting, the PBS NewsHour examines the vanishing coastline of Louisiana and the effect it's having on the native tribes who live there. This report is part of our series Coping with Climate Change.

A recent five-month, 8,300-mile journey across 26 states gave Native Americans a chance to voice the concerns of tribes across the country -- and to launch a coordinated movement to intensify the community's presence on Washington's political radar.