UFO News Article:

“Interactive map:
Spotting Unidentified Flying Objects in South Dakota”,

10 January 2013 
(Argus Leader, Sioux Falls, South Dakota)

The UFO case reports come from the National UFO Reporting Center (NUFORC), according to the Argus Leader:

http://www.argusleader.com/interactive/article/20130110/UPDATES/130110009/Interactive-map-Spotting-Unidentified-Flying-Objects-South-Dakota?nclick_check=1

Map of South Dakota (1.bp.blogspot.com)

(1.bp.blogspot.com image)