81 was the age of the person . Battelle Memorial Institute are the institutions John Robert Gregg worked at . This person is resided at  Los Angeles . Violating the Espionage Act are the crimes this person is convicted for . The person named John Robert Gregg died on October 4,2001 . The doctoral students of John Robert Gregg are George Zweig . operatic pop these are the genres in which John Robert Gregg sings . John Robert Gregg played turntables instruments . 51 is the number of children that the person has . Brother/Reprise/Warner Bros. are the labels in which this person sings . This person has a website named panicatthedisco.com . inventor, Inventor , Humanitarian, Educator, publisher, author  are the person's occupation . The resting place of John Robert Gregg is  Hawaii . On November 20, 1928 a person named John Robert Gregg was born
John Robert Gregg has the website www.megadeth.com