FROM MURTHY.COM

What Are Security Checks?
An important aspect of Nonimmigrant Visa processing at U.S. Embassies and Consulates is the security check procedure. A security check is performed by immigration officials as a necessary part of each visa application. The individual annoyance of waiting for a delayed security check pales in comparison to the national security concern of carefully screening individuals who want to enter the U.S.
The uncertainty of the security check process and the often time-consuming delays can cause a potential visa applicant to wait an unspecified amount of time. Meanwhile, business plans, employment opportunities, major life events and holidays can pass without the issuance of a visa. The most common types of checks required are discussed below.

What are the Types of Security Checks?
Visa Condor Checks, are required for specified individuals. The exact criteria for which applicants this Check applies to are confidential. However, anecdotal evidence indicates that any one of a number of factors may trigger the need for Visa Condor Clearance:

The U.S. Department of State reports that approximately 80% of Visas Condor clearances are completed within 30 days.

Visa Donkey Checks are based on a “name hit”, meaning a name is similar to an individual of interest to U.S. authorities. In theory, the name hit is non nationality-specific. However, male applicants from Middle Eastern countries are most often subject to this type of check. Processing estimates for most Visa Donkey clearances take between 2 to 4 months, although long delays are no unheard of for a select few.

Visa Mantis Checks are required for individuals who are involved in any of the technologies included on a list of 15 areas. The Critical Fields List (CFL) of the Department of States Technology Alert List is very comprehensive and includes almost any field relating to military, weapons technology or intelligence. This includes biochemistry, chemical engineering, and certain medical research specialty fields. For example, a high school chemistry teacher from France intending to visit the U.S. could be subject to a Mantis Check. Most Mantis checks are completed within 10 weeks from the date of request by the consular officer.

Routine Criminal Checks are performed by immigration officials by using the Consular Lookout and Support System (also known as “CLASS”). This system contains information on criminal convictions, FBI records, and terrorist watch lists. The system is updated very regularly, and is a valuable tool of national security to immigration officials.