This is a still taken from CCTV issued by the Metropolitan Police in London on Monday Feb. 23, 2015, of 15-year-old Amira Abase, left, Kadiza Sultana,16, centre, and Shamima Begum, 15, going through Gatwick airport, south of London, before they caught their flight to Turkey on Tuesday Feb 17, 2015. (AP Photo/Metropolitan Police)