A new round of negotiations could lead to agreement on the Iranian nuclear programme. A deal would most likely spark discussions about NATO’s plans to build territorial missile defence, including the construction of a U.S. installation in Poland. Several arguments can be put forward for not changing the current plans. However, reassessments of MD policy should not be totally discarded. Poland should push for a formulation of clear positions from the U.S. and NATO on this issue, highlighting that any modifications should be based on solid premises.