Greenpeace, one of the most well-known environmental organizations, is facing a historic lawsuit seeking at least $300 million in damages. The lawsuit is over Greenpeace's role in protests against a pipeline near the Standing Rock Sioux Reservation in North Dakota. The pipeline's owner, Energy Transfer, claims that Greenpeace enabled illegal attacks on the project and led a 'vast, malicious publicity campaign.' Greenpeace says it played only a minor, peaceful role in the protest and that the lawsuit is an attempt to limit free speech. The trial is seen as a critical test of the future of the First Amendment.