For this reason,the flight attendants receive passengers and their hands behind their backs!

 Often we notice and we are on board that the flight attendants stay their hands behind their backs, especially when travelers receiver, is ever wondered why?
Keep the flight attendants their hands behind their backs when the passenger reception for one reason, and it's not about hygiene, but in fact, they are Iqmn after people entering the plane, through a small counter were expecting in their hands and Tkpson it every time the traveler enters the plane, as reported The newspaper "The Independent".