He earns goodwill by hiring residents, building community centers, paving potholed roads and digging water wells.

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He breached the Assyrian siege by digging his famous water tunnel under the city.

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Next came ditch digging, which would allow water to come near areas where gold was found.

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Yet as Sana'a's water basin continues to deplete, Mohammed's family, like so many others throughout the region, are still digging deeper and deeper to find the water they need.

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Ma Jun, a water specialist in Beijing, says that since the 1950s China has been digging ever deeper wells, and building ever more dams, canals, and water diversion projects.

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Last summer someone in another West Virginia mine punched a hole in an embankment, apparently to keep black water from rising near a piece of equipment needed to continue digging.

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With the help of many PTA volunteers, we installed a large green house, water garden with fish, bridge, butterfly garden, weather station, sundial, archaeology digging area for fossils and minerals, tree stumps for counting the rings, benches for an outdoor classroom and reading area, and over 60 different plants, shrubs and trees.

WHITEHOUSE: Parental Involvement in Schools: The Key to Our Children's Success | The White House