Given an agreement with Iran can be reached, why then would missile defences be needed in Europe against a threat that no longer existed? That means US missiles in Europe to defend NATO could be withdrawn.
In several days time, the P-5 Plus One nuclear talks with Iran should reach resolution, one way or the other. This is a virtually zero-sum situation. Either both sides can reach an accommodation on how to ensure Iran will not and cannot build nuclear weapons for years to come or they will not. And even if a short extension is reached, at some stage this negotiation will still end.
