Congress has promoted the employment of persons with disabilities since 1945, and has enacted robust legislation - including the Americans with Disabilities Act - in support of this objective. The Department of Labor’s timeline of key events in the history of disability and employment can be found here: https://www.dol.gov/agencies/odep/ada30/timeline.
The U.S. Department of Labor’s Office of Disability Employment Policy has issued a poster for National Disability Employment Awareness Month, which reflects this year’s theme, “Advancing Access and Equity.” The poster is available for download here: https://www.dol.gov/sites/