Last updated at 07:06
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WW1 centenary events across the world

Pictures of the ceremonies held across the UK and in Belgium marking 100 years since Britain joined World War One.
The Queen was also among those to pay their respects in Scotland when she attended a memorial service at Crathie Kirk Church in Aberdeenshire.
The Queen attends a service at Crathie Kirk Church in Crathie, Aberdeenshire
100 white crosses have been placed outside New Zealand's parliament building in Wellington, in memory of the more than 18,000 New Zealand troops killed in WW1.
100 white crosses outside New Zealand parliament
Prince William and David Cameron laid loose flowers as a mark of respect at the ceremony - rather than wreaths or poppies, which became a tradition after the end of World War One.
The Duke of Cambridge (centre) and David Cameron (2nd right) lay flowers at the ceremony.
Across the country lights were switched off and candles were lit, including outside Number 10 Downing Street, as people remembered all those who lost their lives during WW1.
A lantern being placed at the front door of Number 10 Downing Street
The lights were also switched off at the Houses of Parliament, as part of the UK-wide "Lights Out" event. The day before the war began the then-foreign secretary Sir Edward Grey said: "The lamps are going out all over Europe; we shall not see them lit again in our lifetime."
Lights switched off at the Houses of Parliament
A service was held at Westminster Abbey, in London, where a light installation called Spectra beamed a column of white light into the sky while a candle-lit prayer vigil was held inside.
A column of white light projected into the sky above Westminster Abbey, in London
The Duke and Duchess of Cambridge, Prime Minister David Cameron and Prince Harry attended a twilight ceremony at the St Symphorien Military cemetery, near Mons, Belgium. Mons was the location of a large battle during WW1.
World leaders commemorate the 100th anniversary of the outbreak of World War One
King Philippe of Belgium was met by a girl dressed in white in Liege. She carried a white balloon as a sign of peace.
King Philippe of Belgium is handed a balloon by a girl dressed in white in Liege
The Duke and Duchess of Cambridge spoke to French President Francois Hollande at the ceremony.
The Duke and Duchess of Cambridge with Francois Hollande
Prince Harry laid a wreath and met members of the armed forces during a visit to Folkestone, Kent.
Prince Harry meeting members of the armed forces in Kent
Also in Folkestone, balloons decorated with poppies and carrying the names of soldiers who died during the war were released into the sky.
Balloons decorated with poppies
The Tower of London moat has been turned red by 888,246 ceramic poppies, one for every British and Commonwealth soldier killed during the war.
Ceramic poppies in the moat of the Tower of London
Members of re-enactment group the Great War Society were showered by poppies in a ceremony at the Tank Museum in Bovington, Dorset, on Monday.
Members of the Great War Society surrounded by poppies