Ted Petry, last surviving witness to first self-sustaining nuclear chain reaction, dies at 94
<p>Ted Petry, last surviving witness of successful Chicago Pile-1 reaction, dies</p>
Ted Petry dies; last known witness to historic 1942 U. of C. nuclear reaction
<p>Ted Petry, last living witness of first nuclear chain reaction at UChicago, dies</p>
A witness to atomic history
<p>Ted Petry recounts world’s first nuclear reaction at UChicago, 75 years later</p>
UChicago
A witness to atomic history
Ted Petry recounts world’s first nuclear reaction at UChicago, 75 years later