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SAN FRANCISCO, Dec. 18 (UPI) -- The popular Internet site Twitter was hacked in the overnight hours, but company officials said the issue was resolved.

COPENHAGEN, Denmark, Dec. 18 (UPI) -- U.S. President Obama arrived in Copenhagen, Denmark, on the final day of the climate change summit, meeting with other heads of state trying to broker a deal.

SEOUL, Dec. 18 (UPI) -- Former South Korean Prime Minister Han Myeong-sook was arrested Friday in an alleged corruption case, which she has denied.

PHNOM PENH, Cambodia, Dec. 18 (UPI) -- A U.N.-backed tribunal in Cambodia in its first such actions against former Khmer Rouge leaders charged Ieng Sary and Nuon Chea with genocide.

Firm offers Christmas 'divorce voucher' … Boy, 4, found with beer, stolen gifts … Dynamite stick found in church … Eatery offers discounts for tattooed … Watercooler stories from UPI.

Tiny snowman offers worldwide greetings … Turtle's gas triggers alarms … Deputies: Cache of 60 stolen gnomes found … Drunken man insists on paying $72 for taco … The world as we know it from UPI.

UPI horoscopes for Friday, Dec. 18, 2009.

UPI Almanac for Friday, Dec. 18, 2009.

CHICAGO, Dec. 18 (UPI) -- U.S. military and chemical companies failed to warn of the danger of Agent Orange, the chemical used as a defoliant in Vietnam, the Chicago Tribune reports.

SAN DIEGO, Dec. 18 (UPI) -- Female facial beauty may be a matter of cognitive averaging, U.S. and Canadian researchers say.

RACINE, Wis., Dec. 18 (UPI) -- The former mayor of Racine, Wis., has agreed to plead guilty to sex charges, court documents say.

LOS ANGELES, Dec. 18 (UPI) -- Transmission of H1N1 among passengers during a trans-Atlantic airline flight could be fairly high, U.S. researchers said.

PORTLAND, Ore., Dec. 18 (UPI) -- Jerryd Bayless made three free throws in the final 8.9 seconds Thursday and the Portland Trail Blazers held on to defeat Phoenix 105-102.

BETHESDA, Md., Dec. 18 (UPI) -- Deficiencies in omega-3 fatty acids may be a factor in mental illnesses, U.S. researchers suggest.

PARIS, Dec. 18 (UPI) -- Killings and rapes at an opposition rally in Guinea in September were carried out by the country's elite Presidential Guard, Human Rights Watch said Thursday.

BEIJING, Dec. 18 (UPI) -- China says the 22 Uighurs who have fled to Cambodia are suspected of criminal activities stemming from the July ethnic riots in the Uighur region.

SYDNEY, Dec. 18 (UPI) -- Bushfires raging in eastern Australia destroyed at least 10 houses Thursday, officials said.

SAN JOSE, Calif., Dec. 18 (UPI) -- Joe Thornton scored twice Thursday and the San Jose Sharks pulled away in the third period to down Anaheim 4-1.

NEW YORK, Dec. 18 (UPI) -- New York officials say they are considering requiring city restaurants to post their grades of A, B or C based on their most recent sanitary inspection grade.

ROCHESTER, N.Y., Dec. 18 (UPI) -- Avid video game players get faster not only on their game of choice, but on a variety of unrelated laboratory tests of reaction time, U.S. researchers say.