During World War II , he worked at the MIT Radiation Laboratory .
He was a member of the Columbia University team which was the first in the United States to verify the European discovery of the nuclear fission of uranium via neutron bombardment .
During World War II , member worked at the MIT Radiation Laboratory .
He was a member of the Columbia University team which was the first in the United States to verify the European discovery of the nuclear fission of uranium via neutron bombardment .