abiding by

a court ruling that they give DNA samples to a national database. They'll then be compared with DNA from people who disappeared or were killed under military rule.

德国态度转变 希腊危机现曙光

Financial markets appear to have settled a little after the German Chancellor Angela Merkel softened her position on moves to

prop up

the Greek economy. The German government wants private sector banks to shoulder more of the burden by giving Greece more time to make repayments on its huge debts. Andrew Walker reports.

World News from the BBC

越南开始清理越战时遗留橙剂 美将出手援助

Vietnam is beginning a joint operation with the United States to remove traces of the toxic

defoliant

Agent Orange. The initial focus is a former US military base, which is still contaminated with the chemical, which was used to destroy

vegetation cover

for communist forces during the Vietnam War. Vietnam and the US are improving relations amid shared concern about China's growing power.

英国研究人员试图寻找帕金森病的方法

Researchers in Britain who are trying to find a cure for Parkinson's disease are creating a bank of artificially-grown brain cells from patients suffering from the illness. Parkinson's disease is a

degenerative

disorder, which attacks parts of the brain that control movement. Scientists are using a new stem cell technique allowing them to turn skin from patients into small pieces of brain. The aim is to build up a brain bank, enabling researchers to study how Parkinson's develops and to test new drugs. Dr Richard Wade-Martins is leading the study.