By "full of Muslims in robes" I meant that it is not an infrequent occurence to see draped women in Europe even if it is still not the norm or majority of pax, whereas I rarely see them in the U.S. on domestic flights even when I fly out of DTW, i.e., Detroit has a very large Muslim population. On each of my last six transatlantic flights there have been sets of draped Muslims, so one would presume European airline security personnel must deal with them regularly and have some kind of procedure they are supposed to follow.