I first heard about this issue via the following YouTube link to a political show/insider thing.
They said it could go down in a week or two.
Obviously, in terms of Israel striking first, that's up to God as to when, but assuming the heat between the US/Israel and Iran doesn't cool in the next week or so, I can see this going down ASAP. In fact, I read an article in the Israel Post
this past weekend that said this week Israel airforce pilots are doing drills and getting ready to strike.
Personally, with the Feast of Tabernacles wrapping up this week, I'm living day-by-day, hour-by-hour. I personally expect to hear the trumpet extremely, extremely soon.