US border guards can't believe Nigerian man is a software engineer, google "questions to ask a software engineer" and give him a pop quiz

Celestine Omin is a Nigerian software engineer who works for Mark Zuckerberg and Priscilla Chan's company Andela, founded to give talented African coders an entree into the leading American tech firms; this week, he flew to the USA on a B1/B2 visa to meet with the company, but he found himself detained at the border. (more")