http://www.ada.gov/ada_25th_anniversary/index.html
The above link contains information on the ADA from the Department of Justice, including access to a video of the signing, legal information, and ways to commemorate the passage of this legislation.
[From the above link]: “Twenty-five years ago, through the Americans with Disabilities Act (ADA), our nation committed itself to eliminating discrimination against people with disabilities. The U.S. Department of Justice’s Civil Rights Division is proud to play a critical role in enforcing the ADA, working towards a future in which all the doors are open to equality of opportunity, full participation, independent living, integration and economic self-sufficiency for persons with disabilities. In honor of the 25th anniversary of the ADA, each month the Department of Justice will spotlight efforts that are opening gateways to full participation and opportunity for people with disabilities.”