TOPSHOT - A Union flag flies at half-mast from a flagpole above the Houses of Parliament in London on May 23, 2017, as a mark of respect to those killed and injured in the terror attack at the Ariana Grande concert at the Manchester Arena in Manchester on May 22. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. / AFP PHOTO / NIKLAS HALLE'N (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)
