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This image released by Japan Ground Self-Defense Force via Kyodo News shows the inside of Unit 4 at the stricken Fukushima Dai-ichi nuclear power plant in Okumamachi, Fukushima Prefecture, northeastern Japan, Sunday, March 27, 2011. (AP Photo/Japan Ground Self-Defense Force via Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE
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This image released by Japan Ground Self-Defense Force via Kyodo News shows the inside of Unit 4 at the stricken Fukushima Dai-ichi nuclear power plant in Okumamachi, Fukushima Prefecture, northeastern Japan, Sunday, March 27, 2011.

Mounting problems, including badly miscalculated radiation figures and inadequate storage tanks for huge amounts of contaminated water, stymied emergency workers Sunday as they struggled to nudge Japan's stricken nuclear complex back from the edge of disaster. Workers are attempting to remove the radioactive water from the tsunami-ravaged nuclear compound and restart the regular cooling systems for the dangerously hot fuel.

TOKYO (AP) — In planning their defense against a killer tsunami, the people running Japan's now-hobbled nuclear power plant dismissed important scientific evidence and all but disregarded 3,000 years of geological history, an Associated Press investigation shows. The misplaced confidence displayed by Tokyo Electric Power Co. was prompted by a series of overly optimistic assumptions that concluded the Earth couldn't possibly release the level of fury it did two weeks ago, pushing the six-reactor Fukushima Dai-ichi complex to the brink of multiple meltdowns.

TRIPOLI, Libya (AP) — Anti-aircraft fire has been heard in Libya's capital Tripoli after dark, signaling that another round of international airstrikes on Moammar Gadhafi's regime is under way. Residents in the contested city of Misrata in western Libya reported fighting Sunday between anti-government rebels and pro-Gadhafi forces firing from tanks on residential areas.

WASHINGTON (AP) — Ahead of President Barack Obama's national address on Libya, top officials of his administration claimed major strides were being made in bolstering rebels fighting Moammar Gadhafi's forces but acknowledged there was no timetable for ending the international operation. Lawmakers of both parties voiced skepticism over the length, scope and costs of the mission.

WASHINGTON (AP) — Millions of retired and disabled people in the United States had better brace for another year with no increase in Social Security payments. The government is projecting a slight cost-of-living adjustment for Social Security benefits next year, the first increase since 2009. But for most beneficiaries, rising Medicare premiums threaten to wipe out any increase in payments, leaving them without a raise for a third straight year.

LATAKIA, Syria — Syria's army was out in force Sunday in a port city scarred by unrest aimed at symbols of the government, which is struggling to put down an unprecedented nationwide outbreak of protest and dissent. President Bashar Assad's regime has responded by both fatally shooting protesters, and promising reform, and a lawmaker told The Associated Press on Sunday that he expected Assad to soon announce that he was lifting a nearly 50-year state of emergency. The timing remained unclear.

CORAL SPRINGS, Fla. (AP) — If there's any place where tea partiers in Congress might hesitate to call for cuts in Social Security and Medicare to shrink the federal debt, Florida's retirement havens should top the list. Even here, however, Republican lawmakers are racing toward a spending showdown with Democrats exhibiting little nervousness about deep cuts, including those that eventually would hit benefit programs long left alone by politicians.

ATLANTA (AP) — The Atlanta courthouse gunman said in letters that he escaped from guards and then killed four people in a shooting rampage to fight back against what he believed was a racist justice system, according to documents obtained by The Associated Press. In the letters, which were among thousands of Georgia Bureau of Investigation documents reviewed exclusively by the AP, Brian Nichols lays out his motive for the March 2005 slayings in stark racial terms.

RIDGELAND, S.C. (AP) — As Interstate 95 sweeps past this small town along South Carolina's coastal plain, motorists encounter cameras that catch speeding cars, the only such devices on the open interstate for almost 2,000 miles from Canada to Miami. The cameras have nabbed thousands of motorists, won accolades from highway safety advocates, attracted heated opposition from state lawmakers and sparked a federal court challenge.

LOS ANGELES (AP) — Reese Witherspoon has walked down the aisle. A spokeswoman for the actress says the "Walk the Line" star wed her fiance, Hollywood agent Jim Toth, in Ojai, Calif., about 90 miles north of Los Angeles. Publicist Nicole Perna did not reveal details about the Saturday ceremony. Usmagazine.com first reported the nuptials.