Note I do not work in Airport security or at a border checkpoint...but: I have happended to travel in regions of the world where the wearing of hijabs and burkas are commonplace and everyone's identification of course showed one's face and those garbed in such fashion that one couldnt just pull down the viel easily or had to have ones face obscured from the sight of all non-familial males had to go into a seperate room and have their identity confirmed by a female officer.