Countries that formerly had nuclear weapons or have pursued development of nuclear weapons

There are a few countries that either possess nuclear warheads or are very determined to obtain them. But how many of the countries can you name that either once possessed weapons or sought to develop them and since abandoned the idea?
Red = known to have possessed (or possesses) fully functioning nukes
Green = developed programmes far enough to have enriched uranium, or reached other high stage of development
Purple = pursued a research programme but never developed any real tangible resources
Blue = only suspected to seek nuclear capabilities
Quiz by HelveticaBold
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Last updated: October 6, 2017
First submittedOctober 6, 2017
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Fully developed six warheads but dismantled before testing
South Africa
Inherited nuclear weapons after collapse of USSR, dismantled in exchange for compensation
Belarus
Kazakhstan
Ukraine
Began nuclear weapon programme in 1939, halted by WWII, (now member of NATO nuclear sharing)
Germany
Began developing nuclear weapons but dismantled before completing
Libya
Began nuclear weapons programmes then abandoned them
Argentina
Brazil
South Korea
Taiwan
Hint
Answer
Pursued a secret nuclear weapons programme, abandoned after a civilian revolution
Romania
Pursued nuclear weapons programme during WWII, now considered 'nuclear capable'
Japan
Pursued nuclear weapons programme in 70s, forced to abandon after bombings by Israel
Iraq
Ran a nuclear weapons research program in the 50s
Sweden
Began nuclear weapons research less than two weeks after Hiroshima & Nagasaki bombings, abandoned in 1988
Switzerland
Though this country has no programme of its own, reports suggest intent to purchase a nuclear weapon from outside
Saudi Arabia
Widely suspected to have started a nuclear weapons research programme
Myanmar
Widely suspected to have started nuclear weapons research programmes in the past
Algeria
Egypt
Syria
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