HARARE, Zimbabwe -- Zimbabwe came under threat of further sanctions on Saturday as President Bush said the U.S. was working on new ways to punish longtime leader Robert Mugabe and his allies following the widely denounced presidential runoff election.

Douglas Birch

MEYRIN, Switzerland -- The most powerful atom-smasher ever built could make some bizarre discoveries, such as invisible matter or extra dimensions in space, after it is switched on in August.

WASHINGTON -- More math, please.

BROWNSVILLE, Texas -- The steel fence that the U.S. government wants to build along the Mexican border would do more than slice through the University of Texas' Brownsville campus and cut off the golf course from the rest of the school.

Jim Salter

WINFIELD, Mo. -- A heroic effort by hundreds of townspeople, volunteers and National Guardsmen to hold back the Mississippi River failed Friday -- undone by a burrowing muskrat. The furry rodent dug a hole through the earthen levee in this eastern Missouri community, allowing water to penetrate the floodwall, which failed shortly before dawn.

YONGBYON, North Korea -- The gray cooling tower crumbled behind billowing dust clouds in seconds Friday, reducing the structure at North Korea's nuclear reactor into a pile of rubble. It was a choreographed show by the communist regime meant to affirm an intention to stop making atomic bombs.

Just outside his sealed bedroom window, beyond the chain-link fence that surrounds his next-door neighbor's yard, sit the reasons David Adams says he can't sleep: two bushy-tailed dogs that bark and howl all night.

OMAHA, Neb. -- Severe storms with strong winds swept through the Plains on Friday, forcing swimmers practicing for U.S. Olympic trials in Omaha to flee pools and run for cover, killing two people in Iowa, and knocking out power to thousands.

UNITY, N.H. -- Barack Obama and Hillary Rodham Clinton sought Friday to turn the page on their bitter, history-making fight for the Democratic presidential nomination, declaring the next chapter is about beating Republican John McCain.

WASHINGTON -- The Taliban has regrouped after its initial fall from power in Afghanistan and the pace of its attacks is likely to increase this year, according to a Pentagon report that offers a dim view of progress in the nearly seven-year-old war.

Burt Herman

SEOUL, South Korea -- The gray cooling tower stands 60 feet above North Korea's main nuclear reactor complex, the most visible symbol of its atomic weapons program.

Silent on central questions of gun control for two centuries, the Supreme Court found its voice Thursday in a decision affirming the right to have guns for self-defense in the home and addressing a constitutional riddle almost as old as the republic over what it means to say the people may keep and bear arms.