I think that is very likely. It's hard to see how the Saudis would give in to such threats directly but there must be a calculation here - can they force the S

I think that is very likely. It's hard to see how the Saudis would give in to such threats directly but there must be a calculation here - can they force the Saudis to the negotiating table with this new capability or can the US supply a missile defence system capable of stopping this? I suspect that forcing both sides to the table would be the RoW's preference? What a time to be Trumps new incoming National Security Advisor - busy morning !