One depicted survivors wading through water, with a pack of sharks approaching.
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The apparatus he used, known as the Jetlev R200, is a water-propelled jet pack that can shoot a person 30 feet into the air and run for some 4 hours.
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Each of us wore a lightweight pack, with a water supply fitted to a thin plastic tube to suck on while we ran.
Instead of bark canoes, today you can hire sturdy sea kayaks, and in place of fishing nets, pack enough food and water to last a week.
And the Western states say their snow pack is melting, jeopardizing their water supply.
For instance, the melting snow pack in the Sierras could reduce the water supply for cities and agriculture.
That can hurt more than a rider's image because cyclists often need the help of their direct competitors for a water bottle, or to trade at the front of pack in a strong headwind.
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REI's walls, explaining the risks of exercising without a hydration pack strapped on to your back, so that you can sip water regularly.
"Those water masses play a very important role in the present-day status of the ice pack and changes in the delivery would have an influence and effect on ice distribution, " said Weingartner.
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"The water levels came up so fast some of the folks didn't have time to actually pack their things and move out, so they're having to do it after the fact, " Wakulla County Undersheriff Maurice Langston told CNN.
Snow-pack and glaciers provide a buffer between when the precipitation falls as snow and when it is released as water.
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