"US claims against Iran: why now? (A real) Analysis."
"If you take the claims at face value, the reason is that only now has the evidence become substantial enough to be made public. The number of attacks is said to have grown as well, so that is another explanation put forward for going public now. A trend has been identified about which information should be given.
"According to this position, there is nothing sinister about the timing of the claim. It is the result of an evidence-based process which has only now reached the stage of producing a result. And after all, reporters have been asking for this evidence for months.
"There are other possibilities as well."
Arf