Let’s get this out of the way: there is no sign of Monica Lewinsky’s blue dress in Bill Clinton’s personal monument to his immortality, a cantilevered span of steel and glass that houses the physical remains of his presidency. But the William J Clinton presidential centre, which opens on Thursday, is none the less a living mausoleum to America in the 1990s, redolent of the achievement, glitz and tawdry scandals that will endow his legacy.

South Africa is at the crest of a wave of international studies to test the safety and efficacy of a seaweed-based microbicide, which once inserted into a woman’s vagina could help prevent the spread of Aids. The study is particularly important in societies where women have difficulty persuading partners to use condoms. If proven to be efficacious, plans will be made to mass-produce and market the product.

The French President, Jacques Chirac, expressed fresh doubts about the invasion of Iraq on the eve of his visit on Thursday to Britain, saying it had left ”the world more dangerous”. Chirac’s comment, in an interview broadcast on Wednesday night, came only 48 hours after he undercut Tony Blair by suggesting the British prime minister had failed to secure any concessions from George Bush in spite of supporting the war.

Iraqi authorities on Wednesday admitted they still had no clear idea about who killed the aid worker Margaret Hassan. Investigators are being hindered by the uniqueness of the case, and the complexity of the insurgency. In previous kidnappings, Iraq’s several insurgent groups have been quick to identify themselves and claim responsibility, using videos to make their demands.