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.