Word: heating
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...warming effect because of the altitude at which they're emitted. As jets soar they leave behind contrails, vapor threads of condensation that can persist for hours, especially in colder areas, and behave like high-altitude cirrus clouds. Those clouds seem to have a net warming effect, trapping heat in the atmosphere. Planes also create ozone, a greenhouse gas that has a stronger warming effect at high altitudes than low. The science is still being nailed down, but the side effects of high-altitude emissions could double air travel's contributions to global warming, says Dan Lashof, science director...
...decrease the risk of further damage to the shuttle on re-entry. But Shannon says he's more comfortable with the known risks associated with the gouge than with the unknown risks of an untried repair job, which would have required the astronauts to coat damaged tiles with heat-resistant paint and fill the hole with a caulk-like goo. The next shuttle mission, Shannon said, will likely include an in-space test of repair options, so mission managers can better understand what they're facing...
...careful analysis of the risks, NASA is betting that the chances of catastrophe when the damaged space shuttle Endeavour returns to Earth on Aug. 22 are zero. If this were the NASA of old - the one that disastrously miscalculated the dangers of a leaky O-ring and a punctured heat shield to the Challenger and Columbia shuttles, respectively - you would surely have heard a round of protest from at least a few highly qualified aerospace engineers...
...with a few hushed sighs and gentle nods, in keeping with the somber mood of the Independence Day festivities at the governor's mansion. There was little of the chest-thumping pride or fireworks on display for the few hundred guests - European consuls fiddling with ties in the muggy heat; old freedom fighters standing tall, their faces gaunt and expressionless. Sixty years after the waning British Empire hastily departed after jotting down some lines on a map turning one country into two, the Indian Subcontinent has cause to both mourn and celebrate the day of its bitterly won freedom. Indeed...
...Tuesday, as he spent four-plus hours shaking hands at the Iowa State Fair in 95-degree heat, the delicate dance Richardson faces was on full display. "You're pretty tall to be a Mexican," one Iowan told Richardson, dressed in jeans and cowboy boots. At the fair's traditional soapbox, a must-hit event for all presidential hopefuls, Richardson - predictably - was asked about his stance on illegal immigration. With rivulets of sweat making their way across his neck and chin, he launched into his four-point plan on how to solve the immigration problem, which includes punishing employers...