MANCHESTER, ENGLAND - MAY 26: Flowers and balloons are left in Saint Ann's Square in tribute to those killed in an explosion at the Manchester Arena earlier this week on May 26, 2017 in Manchester, England. The explosion at the Manchester Arena on the evening of May 22 happened as concert goers were leaving the venue after Ariana Grande had performed. Greater Manchester Police are treating the explosion as a terrorist attack and have confirmed 22 fatalities with many more injured. (Photo by Anthony Devlin/Getty Images)
