re: #245 Racer X

Yes they could.

May 27th, 2011 - Haifa is nuked
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February 2012 - Investigators gather evidence for analysis
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March 2013 - Investigators determine there is a 72.5% probability that nuclear material originated from Iran.
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Oct 2014 - Iran still refuses to provide sample materials to refute nuclear material origin.
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Aug 2015 - retaliatory strike against Iran.

Does not make sense does it?

This is if the UN investigated.
Israel would respond quickly, as would the US.