One of the UK’s newest nuclear-powered submarines has docked in Gibraltar after a collision with a merchant vessel during a training exercise. bbc.com

 A group of ten Democratic senators have penned a letter to US President Barack Obama urging him to cancel development of a new nuclear-capable cruise missile, in what appears to be the next salvo from nonproliferation advocates on Capitol Hill against the weapon. defensenews.com

Vice President Joe Biden said Thursday that the U.S. had accepted an invitation to send a Navy ship to New Zealand for the first time in three decades, signaling an end to a stalemate between the two countries that was sparked by New Zealand’s anti-nuclear policy. usnews.com

Last summer’s Iran nuclear deal, the Joint Comprehensive Plan of Action, declares that it does not set “precedents for any other state.” Yet given the decade-long centrality of the Iran nuclear issue to international nonproliferation, the agreement will certainly influence future debates over nuclear nonproliferation and verification. nationalinterest.org