It's the letter of the law, it's a temporary business visa. The USA calls it B-1. https://www.uscis.gov/working-in-the-united-states/temporary-visitors-for-bu

It's the letter of the law, it's a temporary business visa. The USA calls it B-1. https://www.uscis.gov/working-in-the-united-states/temporary-visitors-for-business/b-1-temporary-business-visitor https://www.uscis.gov/working-in-the-united-states/temporary... (I have no comment on the relevance of this to the article.)