The four-letters code you never want to see on your boarding pass

[ahlam1399]

http://img-s-msn-com.akamaized.net/tenant/amp/entityid/BBFpZVi.img?h=100&w=100&m=6&q=60&o=f&l=f

أكثر... (http://www.msn.com/en-in/travel/news/the-four-letter-boarding-pass-code-you-wont-want-when-flying-to-the-united-states/ar-BBGz44W?srcref=rss)