Under the gaze of cameras on nearby spacecraft and more than 70 ground-based telescopes, the Deep Impact probe fired a metre-long copper bullet on a collision course with a 4-mile-wide block of dust and ice known as Comet 9P/Tempel 1.
Previous indoor environmental asthma interventions focused on decreasing allergen/irritant exposure by either blocking exposure (use of dust covers) or reducing burden of specific allergen (cockroach abatement) (Evans et al. 1999; Gergen et al. 1999; Morgan et al. 2004; Shapiro et al. 1999; Woodcock et al. 2003).
Its 15 stories, home to a Muslim community center and a mosque, would rise two blocks from the pit of dust and cranes where the twin towers once stood, a symbol of the resilience of the American melting pot, its supporters said.
Puzzlingly, almost half of all the visible light from distant stars is blocked by shadowy clouds of dust.
The vast distances to the galaxies and thick shrouds of dust blocked a view of the inevitable climax: supernovas exploding in rapid succession as each generation of giant stars dies out.
But the terrorists don't play along; they arrive in four S.U.V.s, drive around in a circle (kicking up a cloud of dust, which blocks the Predator's view), snatch Ferris, and drive off in four different directions.
Take the 40 or so law firms that occupied 217 Broadway, which closed on Sept. 11 and reopened on Oct. 2. As the twin towers collapsed just blocks away, a thick cloud of dust and debris enveloped the Broadway building and was sucked inside by the air-conditioning system.
Nearby walls and lampposts were knocked down in the blast, and dust, blocks of concrete and paper covered surrounding streets.
One theory holds that the impact raised a cloud of dust that blocked the sun, preventing photosynthesis and causing widespread starvation.
Despite its redesign, the university's central building remains a dour, imposing tower block in an uninspiring shade of dust - one of the tallest brick-built buildings in Europe, boasts the press office.
