In Londonderry, hundreds of people attended a ceremony at the war memorial in the Diamond.

BBC: Enda Kenny in Enniskillen Remembrance tribute

Prosecutors say Taylor gave Campbell a diamond during the war in Sierra Leone, contradicting Taylor's testimony that he never handled the precious stones that fueled the conflict.

CNN: STORY HIGHLIGHTS

One example is the war being waged over control of diamond mines in Sierra Leone.

FORBES: Africa and economics

Mr. DIAMOND: Well, in the midst of the Cold War.

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When the war started in 1991, Mr Sankoh's rebels chased out the Lebanese traders from many of the diamond areas and inserted themselves at the top of the diamond pyramid.

ECONOMIST: Sierra Leone

These diamond fields, on the country's borders with Guinea and Liberia, are pivotal to a war that has lasted nearly a decade.

ECONOMIST: Sierra Leone