Having "unusual" technical skills. You need to remember that America is stupid enough that working on calculus problems on a plane, is enough to delay the plan

Having "unusual" technical skills. You need to remember that America is stupid enough that working on calculus problems on a plane, is enough to delay the plane and get searched because the person next to you thinks you're a terrorist: https://www.washingtonpost.com/news/rampage/wp/2016/05/07/ivy-league-economist-interrogated-for-doing-math-on-american-airlines-flight/ https://www.washingtonpost.com/news/rampage/wp/2016/05/07/iv...