What is the FDD, the pro-Israel think tank shaping Trump’s Iran policy?

The Foundation for Defense of Democracies (FDD), a pro-Israel think tank, has a network of former Israeli military and intelligence officials who push the US towards confrontation with Iran. FDD's experts appear on major US news networks and its reports circulate through the US Congress and White House. The organisation's lobbying arm, FDD Action, has spent the US government money on issues including Iran sanctions legislation and US arms sales to Israel. A former senior official from FDD Action has joined the US negotiating team engaging with Iran.