Tax Services:
http://www.irs.gov
US Citizenship and Immigration Services:
www.uscis.gov
Lottery to USA:
www.usagc.org
Have an immigration problem:
www.usimmigrationagency.org
www.iom.int
Want to work in afghanistan:
www.wlr.com
www.titan.com
http://www.mpri.com
United nations:
www.un.org
US department of commerce:
www.export.gov/afghanistan
US agency for international developmet:
www.usaid.gov