NICARAGUA, South America - Local residents enjoy the clean drinking water that they now have at their disposal through relief efforts provided by non governmental organizations like El Provenir and Agua Para Vida. Staff Sgt. Jon Polka, 728 Airlift Squadron, Joint Base Lewis-McChord, McChord Field, Wash., spent three weeks as a volunteer photographer for Blue Planet Network, a NGO funding organization that address the global water crisis. (Courtesy Photo/Staff Sgt. Jon Polka)
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