"evidence" ??? Did we ever see ANY "evidence", other than speeches telling us it's all confidential. We never DEMANDED evidence and the press never pushed for it either. We swallowed the terrorist-around-every-corner line.
When JFK made his charge (1961) that the then-USSR was shipping equipment to Cuba, he had photos to prove it and he went to the UN with the "evidence".
Surely technology has made major advancements in the past 43yrs, and yet we still SEE no evidence. Sadly, this appears to be o.k. for many people as thousands of our sons/daughters are sent into harm's way - many never to return.