This week marks the 23rd anniversary of the signing of the Americans with Disabilities Act by President George W Bush in 1990. The DOJ is running a series of blogs this week to celebrate on the Justice Blog. They are focusing on current intiatives that are "opening up the gateways to full participation and opportunity for people with disabilities."
You can also read short summary of the legal action taken leading up to the ADA on Disability Frontline. The ADA was not the first law enacted to eliminate discrimination against people with disabilities, but it is so far the most comprehensive.
And organizations like ADAPT, which just celebrated its 30th anniversary, continue to fight for Disability Rights.