THE HAGUE, Netherlands — Former Bosnian Serb leader Radovan Karadzic sat in a U.N. jail cell today after being flown to the Netherlands in the dead of night to face charges of genocide against Muslims and Croats during the Balkan wars of the 1990s.

His arrival in a white Serbian government jet marked the end of a 13-year effort by the International Criminal Tribunal for the former Yugoslavia to take custody of its most wanted war criminal. Karadzic is accused or orchestrating the deaths of tens of thousands of people and the sufferings of hundreds of thousands more.

Prosecutors allege Karadzic masterminded atrocities including the 1995 massacre of 8,000 Muslim men and boys in the Bosnian town of Srebrenica, the deadly siege of Sarajevo, and the detention of tens of thousands of people in 20 concentration camps where many were tortured, starved and sexually abused.

The court announced he will be summoned before a judge Thursday afternoon, where he will be asked to enter pleas on each of the 11 counts against him, including genocide, extermination and persecution.

LONDON — Britain's top court refused today to stop the extradition to the U.S. of a British hacker accused of breaking into Pentagon and NASA computers — something he claims to have done while hunting for information on UFOs.Gary McKinnon, 42, faces charges in the United States for what officials say were a series of cyber attacks that stole passwords, attacked military networks and wrought hundreds of thousands of dollars worth of computer damage.The decision by Britain's House of Lords — comparable to U.S. Supreme Court judges — was his last legal option in this country, but his lawyer said she would appeal his case to the European Court of Human Rights in Strasbourg, France.McKinnon's lawyers alleged that an American official had told him he would be forced to serve a lengthy sentence in the United States if he fought against his extradition, something they say amounted to an unlawful threat. The five Law Lords were unanimous in deciding McKinnon had failed to prove his case.

LAUSANNE, Switzerland — The International Olympic Committee ruled Tuesday that Iraq could participate in the Beijing games, reversing itself after the government pledged to ensure the independence of its national Olympics panel.The decision followed last-minute talks between Iraqi officials and the IOC in Lausanne, Switzerland, before a deadline today to submit competitors' names for the athletics events and 10 days before the opening ceremony in Beijing. Iraq's National Olympic Committee was dissolved by the Baghdad government in May, prompting the IOC to suspend the Mideast country from the Olympics for political interference.The IOC had insisted the old committee be reinstated even though four members were kidnapped two years ago. Their fates remain unknown.