This  non immigrant classification applies to people who wish to perform  services in a specialty occupation, services of exceptional merit and  ability relating to a Department of Defense (DOD) cooperative research  and development project, or services as a fashion model of distinguished  merit or ability.

The  H-2B program allows U.S. employers or U.S. agents who meet specific  regulatory requirements to bring foreign nationals to the United States  to fill temporary non-agricultural jobs.

The H-3 non-immigrant visa category allows non-citizens coming temporarily to the United States as either a: 

• Trainee to receive training in any field of  endeavor, other than graduate medical education or training, that is not  available in the non-citizen’s home country.
• Special Education Exchange Visitor to participate  in a special education exchange visitor training program that provides  for practical training and experience in the education of children with  physical, mental, or emotional disabilities.