Britain's Prime Minister Theresa May leaves a tribute message as she leaves a memorial service on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018. Paul Ellis/Pool via Reuters
People leave tributes in St Anne's Square on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2017.
Candles burn with the names of the dead during the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018.
A woman places candles for each of the dead as a tribute in St Anne's Square on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018. REUTERS/Andrew Yates
Cricket - England Nets - Lord's Cricket Ground, London, Britain - May 22, 2018 England players and ground staff observe a one minute silence on the one year anniversary of the Manchester bomb attack during nets.
Words are projected onto St Ann's Church during the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018.
A member of the clergy lights candles for the victims of Mancester Arena attack, ahead of The Manchester Arena National Service of Commemoration at Manchester Cathedral in central Manchester, Britain May 22, 2018. Paul Ellis/Pool via Reuters
People attend a choir concert on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018.
Britain's Prince William leaves a tribute message as he leaves a memorial service on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018. Paul Ellis/Pool via Reuters
Girls sit by a memorial during the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018.
The messages left by Britain's Priince William and Prime Minister Theresa May after attending a memorial service on the first anniversary of the Manchester Arena bombing are seen in Manchester, Britain, May 22, 2018. Paul Ellis/Pool via Reuters
A police officer wears a badge and a bee symbol on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2017.
Manchester Arena bombing anniversary
Memorial services and a moment of silence are held one year after 22 people were killed in an attack targeting a pop concert in Manchester.