When she became the first black woman to win the best actress Oscar, Halle Berry hoped she would be the first of many. Three years on, however, no woman has repeated her success. So Miss Berry, 38, has launched a savage attack on Hollywood producers and directors, accusing them of racial prejudice. "The struggle for a woman of colour to find good material is still very present, and it's a struggle I fight every day," she said. Miss Berry said there was such a shortage of decent roles on offer that she had resorted to buying the rights of books...