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A woman uses a tablet to photograph shafts
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A woman uses a tablet to photograph shafts of light piercing the night sky at the "Spectra" installation by Japanese artist Ryoji Ikeda at Victoria Tower Gardens, adjacent to the partially visible Houses of Parliament, in London on Tuesday, Aug. 5, 2014. The work was commissioned to commemorate the centenary of the outbreak of World War I and will be visible from dusk till dawn until the early hours of Monday, Aug. 11.(Credit: AP / David Azia)

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World War I centenary commemorations

A century after fighting began, the entrenched foes of World War I are coming together in peaceful dignity at events around the globe.