Quartet urges settlement freeze The international Quartet of Mid-East peace mediators urges Israel to freeze settlement activity in occupied territories. Taliban arrests halt UN contacts A former UN envoy to Afghanistan says Pakistan's arrest of Taliban leaders halted a channel of secret UN contact. Pope to sign letter on sex abuse Pope Benedict is to sign a letter to the Catholics of Ireland on how to address the sexual abuse of children by priests. Rio Tinto announces Guinea deal Rio Tinto says it has signed a deal with China to develop a massive iron ore project in Guinea. Srebrenica gay theory irks Dutch Dutch officials reject a US general's claim that troops failed at Srebrenica because of poor morale over gay soldiers. Glowing fly sperm yields results US researchers using genetically engineered fruit flies with glowing sperm track the seed's progress inside the female in real time. Castro supporters heckle marchers Hundreds of Cuban government supporters heckle the "Ladies in White" protesters marking the 2003 crackdown on dissidents. Scarlett Goa death trial begins Two men appear in court accused of killing British teenager Scarlett Keeling, whose body was found in the Indian state of Goa in 2008. China unveils homemade helicopter China's first domestically developed civilian helicopter takes off on a maiden flight in the eastern province of Jiangxi. Clue in the claws: New dinosaur species related to Velociraptor Researchers discover a new species of dinosaur that was very closely related to the Velociraptor. Fulham earn famous win over Juventus Fulham produce a stunning second-leg comeback against nine-man Juventus to make the Europa League quarter-finals. Woods strategy surprises Nicklaus Jack Nicklaus says he is surprised by Tiger Woods' decision not to play any events before his Masters comeback. Can Catholic Church overcome child abuse scandals? Pope Benedict has written a letter to the Catholics of Ireland. What is your reaction? BBC World News