https://en.m.wikipedia.org/wiki/Executive_Order_13769
https://www.theverge.com/2016/11/16/13653490/steve-bannon-tr...
https://www.cnbc.com/2018/08/28/tech-companies-h4-holders-br...
https://www.mercurynews.com/2018/02/20/h-1b-visas-how-the-tr...