From the ACLU, information about the Day of Action:

For nearly seven years, our core values of freedom and fairness have been eroded, from the suspension of habeas corpus and due process, to shameful acts of torture, CIA kidnappings and secret prison programs.

On June 26, 2007, join us in Washington, D.C. as we call on Congress to restore habeas corpus, fix the Military Commissions Act, and restore all our constitutional rights. We even have free buses leaving from many parts of the country… It’s easy to come!

Rally with us outside the Capitol, then help deliver our urgent message in person to Members of Congress.

Go here to sign up (free buses) or sign the petition