Image: William Penney, Otto Frisch, Rudolf Peierls and John Cockroft

Description: Left to right: William Penney, Otto Frisch, Rudolf Peierls and John Cockcroft. They are wearing the American Medal of Freedom.
Title: William Penney, Otto Frisch, Rudolf Peierls and John Cockroft
Credit: Los Alamos National Laboratory 2013-04-26 07:12:06 ([http://web.archive.org/web/20110813050257/http://www.lanl.gov/history/full_size.php?photo_id=925&story_id=10&page_num=4&row_num=18&photo_num=21 archive)
Author: Los Alamos National Laboratory
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License: Public domain
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