Frank Church at the Atoms for Peace conference in Vienna. The person on the left is identified as Dr. Glenn T. Seaborg - 1951 Nobel Laureate for Chemistry. The person on the right is possibly Isidor Isaac Rabi, 1944 Nobel Laureate for Physics.
Frank Church at the corner of a very large table of men listening to a speaker through a translator on headphones. This is most likely a conference between the United States and Russia, or the Soviet Union, and possibly other nations in Kiev, Ukrane