I checked the SSDI and see that the person you're researching passed away earlier this year.

Social Security Death Index about Joseph A Fleming
Name: Joseph A Fleming
Born: 9 Dec 1950
Died: 24 Jan 2012
State (Year) SSN issued: Io

Attached is a hospital note indicating the discharge of Mrs. Joseph Fleming and baby boy in December 1950, and a news item from the Oelwein Daily Register about Joseph's first birthday in Oelwein.