S[o]wing the Wind
Someone, probably Israel, aided by Iranian anti-government militants, has been blowing up Iranian nuclear scientists. Iran seems to have taken offence, and has apparently launched a series of attacks against Israelis abroad. So far, they have fallen far short of the Israeli efficiency and professionalism, but I doubt that we can count on that over the long run.
It seems that the American government has distanced itself from the assassinations, which was probably a really good idea, since if Iran starts attacking inside the US, we will have little alternative but to smash them.
The Israelis face the fundamental question of "Now what?" It's not beyond credibility that Israeli hardliners pushed the assassination program in order to force Iran to respond and provide a casus belli.