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TWITTER: WHYS, ROS, MARK, BEN S, PHILIPPA

MY EMAIL: philippa.thomas@bbc.co.uk

Good afternoon from the WHYS team at Bush House, where it's me Philippa Thomas in the studio for our programme at 1800 GMT,

We had a big response to today's first WHYS on the car explosion which killed a nuclear scientist in Tehran. We'd like to carry on that conversation.

Mostafa Ahmadi-Roshan, who worked at the Natanz uranium enrichment facility, was killed in that attack. Other Iranian nuclear scientists have been assassinated in recent years. Iran blames Israel and the US.

Is this war in all but name?

Is it a proxy war with the US standing behind Israeli attacks? And do Americans have the appetite for outright conflict with Iran?

A lot of articles are coming through speculating about Iran and Israel - and about involvement behind the scenes of bigger powers like the UK, the US, and Saudi Arabia.

Here are a few links for you -

From the Guardian website -

Robert Fox in "This Week" talks of "the growing sensation that the Islamic republic is heading for a major collision with the US and its European and Arab allies by the end of this month". Fox says Tehran is desperate to pin the blame on the West and Israel for starting it.

In Bloomberg, Jeffrey Goldberg writes that the Obama administration "now appears to be moving inexorably towards war"

And he says some of the Republican party's presidential candidates have been getting steamed up by this argument - - an article in the influential Foreign Affairs magazine by Matthew Kroenig called simply "Time to attack Iran".

We'd like to hear from Iran, from Israel, from the US, wherever this story is getting you steamed up too.

If this IS war, what's the likely fallout?

Let us know - as ever - what you think. We're on Facebook, you can tweet us at @bbc_whys, or send me your questions @philippanews.

Or email WorldHaveYourSay@bbc.com, and you can text +44 77 86 20 60 80

Look forward to hearing from you

PT