ພິທີຂີດໝາຍຄົບຮອບ 100 ປີ ຂອງສົງຄາມໂລກ ຄັ້ງທີນຶ່ງ

Left to right, Great Britain Prince William, his wife Catherine, Duchess of Cambridge, French President Francois Hollande, Belgian Queen Mathilde and King Philippe, German President Joachim Gauck, Spanish King Felipe and Luxembourg Hereditary Grand-Duke Prince Guillaume attend a ceremony at the Cointe Inter-allied Memorial, commemorating the 100th anniversary of the outbreak of World War I (WWI) in Liege, Belgium, Aug. 4, 2014.

French President Francois Hollande (left) and German President Joachim Gauck pay their respects during a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Aug. 3, 2014.

The hands of French President Francois Hollande and German President Joachim Gauck are seen during a stone-laying ceremony to mark the 100th anniversary of the100th anniversary of World War I, at the National Monument of Hartmannswillerkopf, in Wattwiller, eastern France, August 3, 2014.

French President Francois Hollande shakes the hand of a man wearing a World War I uniform after a ceremony to mark the 100th anniversary of the outbreak of World War I, at the National Monument of Hartmannswillerkop, in Wattwiller, eastern France, Aug. 3, 2014.

French President Francois Hollande (left) and German President Joachim Gauck attend a ceremony to mark the 100th anniversary of the100th anniversary of World War I, at the National Monument of Hartmannswillerkopf, in Wattwiller, eastern France, Aug. 3, 2014.