An Iowa National Guard helicopter with a tether line flies above the Missouri River near the Dakota Dunes, South Dakota, residential area as the Guard continues to help place large sandbags along the ... more 
An Iowa National Guard helicopter with a tether line flies above the Missouri River near the Dakota Dunes, South Dakota, residential area as the Guard continues to help place large sandbags along the Missouri River which is still rising and overflowing its banks as the Corp of Engineers continues to increase the flow of water through dams north of the Siouxland area Friday, June 3, 2011. The Missouri River dams were built to control periodic spring flooding and provide hydropower, irrigation and other benefits after Congress passed the Flood Control Act of 1944. less 
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Associated Press | Photo By Mercy Air Care-Sioux City, Jerry Mennenga
Fri, Jun 3, 2011 6:45 PM EDT