WASHINGTON -- Advocates for people with disabilities, along with lawmakers who originally passed the Americans With Disabilities Act a quarter-century ago, hailed its anniversary on Monday. But they also called on the country to improve -- both in how it views disabled people, and by ratifying a UN treaty that would help them. “I think too many people still think that there’s an ‘us’ without disabilities and a ‘them’ with disabilities,” Chai Feldblum, commissioner of the Equal Employment Opportunity Commission, said at a Capitol Hill celebration to mark the ADA's 25th anniversary, which fell on Sunday.