Assertion: berkelium's discovery | /r/HasProperty | secret
Facets:
value: due to cold war tensions
type: CAUSE
value: until 1955
type: TEMPORAL
Source sentences:
text: The discovery of the new elements and the associated new data on multiple neutron capture were initially kept secret on the orders of the U.S. military until 1955 due to Cold War tensions and competition with Soviet Union in nuclear technologies.
text: The discovery of the new elements, and the new data on neutron capture, was initially kept secret on the orders of the U.S. military until 1955 due to Cold War tensions.
text: At the time of the hydrogen bomb demonstration, tensions due to the Cold War were running high and many new discoveries were kept secret.