This week we try to make sense of what's happening to the international order, from the end of the Iran deal to the on-again-off-again US-North Korean summit to opening of the US embassy in Jerusalem. Can Europe carve out a separate foreign policy from the Trump administration? Is regime change still the name of the game? And what has it all got to do with the price of oil? Plus we ask if anything is left of Obama's legacy and why it was so easy to undo. With Helen Thompson, Aaron Rapport and Chris Bickerton.