MANCHESTER, ENGLAND - MAY 22: Police officers observe a minutes silence next a Tree of Hope during The Manchester Arena National Service of Commemoration at Manchester Cathedral on May 22, 2018 in Manchester, England. Twenty-two people were killed and hundreds injured when Salman Abedi detonated a bomb at the end of an Ariana Grande concert at Manchester Arena on 22 May 2017. Twenty-eight Japanese maple trees have been planted across the city between Victoria Station and St. Ann's Square. Members of the public have been invited to attach messages to the Trees of Hope. (Photo by Christopher Furlong/Getty Images)
