The US physicist who invented the neutron bomb in 1958 has died in California.
The neutron bomb is a small tactical nuclear weapon, which produces lethal sub-atomic particles that kill people, while leaving buildings and land largely undamaged.
Samuel Cohen, 89, said his bomb was a sane and moral weapon, but he ultimately failed to persuade the United States to include it in its nuclear arsenal.
Only a small number of neutron warheads were produced and Washington never deployed the weapon alongside its other nuclear forces in Europe.
The BBC reports many left-wingers and liberals in Europe and America dubbed it the capitalist bomb.
In the 1940s, Mr Cohen worked on the Manhattan Project to build the atomic bomb during World War II, focusing on the calculations for Fat Man, the bomb dropped on Nagasaki, Japan, in 1945.
His family said he died at home from complications of stomach cancer.
