Word: halting
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Virtually every AIDS expert agrees that only an effective vaccine can halt the epidemic. Yet after more than a decade of trying to develop one, scientists have made little headway. The failure can be traced in part to the notorious craftiness of the virus itself. Researchers still aren't sure what part of the immune system confers protection against HIV, and until they are, they won't be able to induce immunity with a vaccine...
...however, the birthday party came to a crashing halt. In quick succession, a hole was blown in a retaining wall from an adjoining house, hand grenades were thrown at the embassy guardhouse and about 25 rebels belonging to a group known as the Tupac Amaru Revolutionary Movement stormed into the compound. As the insurgents engaged police in a ferocious gun battle, everyone--Peruvian ministers, blue-chip business tycoons, assembled diplomats and their wives--dropped to the ground. "Don't lift your head," the rebels barked, "or it'll be shot...
...east. Yet although the evening news Monday reported that rebel leader Laurent Kabila had been "trembling" since he heard of the President's return, Mobutu brings no army with him. The outgunned Zairian forces have been consistently beaten and humiliated, and it seems unlikely that leadership alone can halt the rebel advance. What Mobutu's arrival is generating so far is a maximum of fuss. State-run television and radio Monday proclaimed it a "great event" and urged Zairians to "show solidarity" with Mobutu by lining the streets from the airport to Camp Tashatshi, a military encampment with a presidential...
...peace process is grinding to a halt.... Only now can we see the extent of the loss," she said...
...clues are tantalizing. In some research centers, investigators are studying an area at the tip of chromosomes that appears to shorten, fuselike, as we grow older. Extinguish the chemical fire that consumes the fuse, and you might be able to bring aging to a halt. Elsewhere, scientists are studying how the waste produced when a cell consumes food can contaminate its innards, a process that can lead to the body-wide breakdowns we associate with aging. Clean up the cells, and you should be able to buck up the entire organism. Still elsewhere, geneticists are beginning to map the very...