Useful Links:
U.S. Citizenship and Immigration Services:
www.uscis.gov
Check your case status with the USCIS:
https://egov.uscis.gov/casestatus/landing.do
Infopass:
www.infopass.uscis.gov
U.S. Department of Labor:
www.dol.gov
U.S. Department of State:
www.state.gov
U.S.Embassies and Consulates:
http://usembassy.state.gov
Find a nearby doctor for medical exam:
https://my.uscis.gov/findadoctor
Find a neaby Application Support Center:
https://egov.uscis.gov/crisgwi/go?action=offices.type&OfficeLocator.office_type=ASC