http://www.cracked.com/article_16335_7-innocent-gestures-that-can-get-you-killed-overseas.html
https://www.thrillist.com/travel/nation/nine-american-hand-gestures-thatll-get-you-punched-in-the-face-overseas
https://www.buzzfeed.com/gabrielakruschewsky/simple-gestures-that-might-be-highly-misunderstood-abroad?utm_term=.goPz1MELE#.ooLV8g1o1