This webpage from the Department of Homeland Security (DHS) provides information on the Department's disability access policies. "DHS is committed to strengthening and supporting full inclusion and equal opportunity for persons with disabilities in its programs and activities, through enforcement and compliance with requirements of the Rehabilitation Act of 1973, as amended, including Section 504 of the Act which states: 'No otherwise qualified individual with a disability in the United States...shall, solely by reason of her or his disability, be excluded from the participation in, be denied the benefits of, or be subjected to discrimination under any program or activity receiving Federal financial assistance or under any program or activity conducted by any Executive agency...' 29 U.S.C. § 794."
United States. Department of Homeland Security: http://www.dhs.gov/