|1895||Wilhelm Roentgen discovers X-ray radiation.|
|1932||James Chadwick discovers the neutron.|
|1938||Otto Hahn and others achieve atomic fission.|
|October 1939|| Albert Einstein and others persuade FDR to|
support research on an atomic bomb.
|December 1941||FDR approves the Manhattan Project.|
|December 1942|| Enrico Fermi and others achieve controlled|
and sustained chain reaction.
First atomic bomb detonated at Alamogordo,|
|August 1945|| Hiroshima and Nagasaki are destroyed by|
|June 1946|| U.S.A. proposes Baruch Plan for international|
control of nuclear weapons; U.S.S.R. rejects it.
|July 1946||First Atomic Energy Act enacted.|
|August 1949||U.S.S.R. detonates its first fission bomb.|
|January 1950|| President Truman approves development of|
the hydrogen bomb.
NSC-68 outlines plan for massive U.S. rearma-|
ment and military spending.
|January 1951|| AEC begins weapons testing at Nevada test|
First experimental production of electricity|
from a nuclear reactor.
|November 1952|| U.S.A. detonates its first hydrogen bomb, fol-|
lowed by U.S.S.R. in 1953.
|December 1953|| President Eisenhower's Atoms for Peace ad-|
|January 1954|| John Foster Dulles announces a new strategic|
policy, massive retaliation.
|June 1954|| AEC affirms denial of security clearance to|
J. Robert Oppenheimer.
|August 1954||Second Atomic Energy Act enacted.|
Congress enacts the Price-Anderson Act, in-|
demnifying the nuclear power industry in the
event of nuclear accidents.