I have read this article - <a href='http://www.bbc.com/news/world-us-canada-34987558' target='_blank' rel='nofollow'>http://www.bbc.com/news/world-us-canada-34987558</a><br/><br/>"The 37-year-old Yemeni, who has been held without charge, appeared before a board on Tuesday."<br/><br/>What "appeared before a board" means?<br/><br/>Thanks.