Assertion: nuclear weapon | /r/HasProperty | both fission
Facets:
Source sentences:
text: Section 8 attempts to collect the available information about the earliest nuclear weapons, both fission and fusion.
text: The first and only nuclear weapons used in warfare were fission bombs with yields of 13 and 22 kilotons of TNT detonated over the Japanese cities of Hiroshima and Nagasaki in 1945.