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NEWS Capital City Weekly On a cool spring morning in the mountains of southwest Washington, 12-year old Cathy Cahill helped her dad plant scientific instruments around the base of trembling Mount St. Helens. A few days later, the volcano blew up, smothering two of his four ash collectors. When he gathered the surviving equipment, Cathy's father found a downwind sampler overflowing with ash laced with chlorine. Tom Cahill of the University of California, Davis, wrote a paper on this surprising result; editors at the journal Science were impressed enough to publish it.

Alaska Science Forum: Sniff the air

Cathy Cahill holds a carbon-fiber AeroVironment Raven she's using to sample plumes of hazy air.
Photo By Ned Rozell | Alaska Science Forum
Cathy Cahill holds a carbon-fiber AeroVironment Raven she's using to sample plumes of hazy air.
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