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South Korean researchers say they've made a significant advance in the production of human embryonic stem cells. They can now use far fewer human eggs to produce usable stem cells — a major step toward mass production. Researchers hope these cells could eventually be used to treat a wide variety of diseases.

The head of New Orleans' police department, Eddie Compass, has resigned. This weekend, he announced that 249 officers, or about 15 percent of the force, are absent without leave after the hurricanes. A special tribunal will determine who has deserted and who has legitimate absences from work.

Iran is threatening to use trade and oil supplies as weapons against countries that voted against Tehran at a recent meeting of the International Atomic Energy Agency. The IAEA approved a resolution referring Iran's suspect nuclear program to the U.N. Security Council for possible sanctions.

Charges emerge that HIV-infected foster children enlisted in federally funded trials of AIDS drugs in the late 1980s and early '90s were involved without adequate representation. Investigative hearings are under way in Washington.

NASA calls off the launch of the Space Shuttle Discovery, citing a faulty fuel sensor. The announcement at Cape Canaveral came less than two and a half hours before the liftoff, scheduled for just before 4 p.m., ET.

Chief Justice William Rehnquist issues a statement that he is not planning to announce his retirement, and he will stay on the Court as long as his health allows. The 80-year-old chief justice was diagnosed with thyroid cancer last October. He was released Thursday from a Virginia hospital after being treated for fever.

The eye of Hurricane Dennis came ashore just east of Pensacola, Fla., Sunday afternoon. Once a Category 4 storm, Dennis packed winds of 120 miles per hour when it hit. Sandra Averhart of WUWF in Pensacola reports.

Ceremonies mark the 10th anniversary of Europe's worst massacre since World War II. About 50,000 family members, foreign dignitaries and guests -- including Serbian President Boris Tadic -- attended the commemoration at the Potocari Memorial Centre in Srebrenica.

Senate's top Republican says the Supreme Court's role is to protect basic rights, even when majorities are in favor of something else. "That happens all the time."

Despite cautions, many Houston-area residents who fled the approaching storm are trying to make their way back home. The city escaped severe damage from Hurricane Rita, but gas supplies are limited.