While its members haven't been chaining themselves to trees, the largest grassroots environmental organization in the country hasn't been absent from the fight to stop the rerouting of highway 55. Local members of the Sierra Club have been using the courts to fight their battle. Jill Walker is a local Sierra Club volunteer. She says her organization can't condone the civil disobedience tactics protesters at the site have engaged in, but she does think their methods can be effective.