please be informed about this

VISA MANTIS: Visa Mantis applies to individuals who are subject to the Technology Alert List (TAL). This list is responsible for the most dramatic delays in non-immigrant visa processing.  The TAL was created over concerns that an illegal transfer of controlled technology (or activities) may impact or become detrimental to Unites States national security. The main goal of the TAL is to stop the potential growth and development of Weapons of Mass Destruction (WMD) within the previously listed terrorist states. The Visa Mantis clearance affects primarily non-immigrant workers in biotech and healthcare fields, but can also impact a number of fields that would not appear to affect U.S National Security, such as landscaping, community housing, and marine acoustics. Visa Mantis is essentially a name-check procedure used for U.S Government-sponsored visa applicants (areas may include: business, education, training, and scientific exchange programs) that fall under the scope of the Immigration and Nationality Act, as well as applicants involved in the fields listed in the TAL.

Chemical Engineering also comes under TAL .