(Project Blue Book, U.S. Air Force, Washington, D.C.)
Source: Fold3.com, Lindon, Utah.
Quote from the document:
“AMC Opinion: No satisfactory conclusion can be drawn. (Page 2)
Just as the truck started across the bridge, the object was sighted directly ahead just above the trees in a bank to the left of approximately twenty degrees (20°) and appeared to be in a slight descent. (Page 10)”
The document contains a drawing of the UFO incident (Page 11).
Satellite photo of Indianapolis, Indiana (tageo.com)