Police stand guard at the scene of a suspected terrorist attack during a pop concert by US star Ariana Grande in Manchester, northwest England on May 23, 2017. / AFP PHOTO / PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images)
Police stand guard at the scene of a suspected terrorist attack during a pop concert by US star Ariana Grande in Manchester, northwest England on May 23, 2017. / AFP PHOTO / PAUL ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images)