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French and German leaders mark WW1 anniversary

3 August 2014 Last updated at 13:25 BST

The French and German presidents have been commemorating Germany's declaration of war on France on 3 August 1914.

Francois Hollande and his German counterpart, Joachim Gauck, made a joint tribute in Alsace to soldiers killed during World War One.

They were to lay the first stone for a memorial at Vieil Armand cemetery.

Mr Hollande lamented the "hellish exercise" which unfolded 100 years ago.