ALT 14-point U.S.-Iran MOU published by Iran’s Mehr News — not confirmed or shared by Washington with the American public. Verified provisions: U.S. force withdrawal from around Iran; $24B in Iranian assets unfrozen before negotiations conclude; Strait of Hormuz reopens under Iranian arrangements; Iran’s missile program and proxy relationships explicitly excluded from final negotiation agenda.

ALT shrouded sun. The Irminger Sea — the corridor between Greenland and Iceland that forms the heart of the GIUK Gap — is one of the most remote and hydrographically complex ocean regions on earth. What moves beneath its surface has determined the outcome of wars. What we will no longer be able to monitor there — and why — is the subject of this investigation. Full sourcing and endnotes at: J.R. Kineman | The American Sextant https://open.substack.com/pub/jrkineman

ALT Russian Delta IV-class ballistic missile submarine (SSBN) running on the surface. The Delta IV carries the Sineva SLBM and forms one half of Russia’s current sea-based nuclear deterrent. Six Northern Fleet SSBNs of this and the Borei class are based on the Kola Peninsula, within transit range of the GIUK Gap. SOURCE: Russian Navy/public domain.

ALT Russian Borei-class ballistic missile submarine (SSBN) underway on the surface, Russian Navy ensign visible on the sail. The Borei carries 16 Bulava SLBMs, each capable of delivering multiple independently targeted warheads. Eight are currently operational; two more Borei-A hulls are under construction. This is the boat that transits the GIUK Gap — the corridor where the U.S. just went dark. SOURCE: Russian Navy/public domain.

ALT An iceberg rises from the grey waters of the North Atlantic under a fog-shrouded sun. The Irminger Sea — the corridor between Greenland and Iceland that forms the heart of the GIUK Gap — is one of the most remote and hydrographically complex ocean regions on earth. What moves beneath its surface has determined the outcome of wars. What we will no longer be able to monitor there — and why — is the subject of this investigation. Ein Eisberg erhebt sich aus den grauen Gewässern des Nordatlantiks unter einer nebelverhangenem Sonne. Die Irmingersee — der Korridor zwischen Grönland und Island, der das Herzstück des GIUK-Gaps bildet — ist eine der abgelegensten und hydrographisch komplexesten Meeresregionen der Erde. Was sich unter ihrer Oberfläche bewegt, hat den Ausgang von Kriegen bestimmt. Was wir dort nicht mehr überwachen können — und warum — ist Gegenstand dieser Untersuchung J.R. Kineman | The American Sextant / Das Amerikanische Sextant https://open.substack.com/pub/jrkineman

ALT Xi Jinping has quoted Mahan’s thesis verbatim as Chinese state policy and spent four decades executing it — commerce, naval strength, bases — while the United States systematically dismantled all three pillars. This analysis traces that divergence from the Reagan 600-ship Navy through the post-Cold War holiday from history to the Beijing summit of May 2026, where a desperate American president sought a lifeline from the world’s most disciplined Mahanian practitioner. The verdict Mahan would render — on Trump, on Xi, and on the restoration timeline — is the subject of the five-part series. Part V features American institutional voices who are confirming the verdict; Part V lays out what recovery requires, what it will cost, and why the submarine program is the proof of concept that it is possible. “The American Sextant” 网址: https://open.substack.com/pub/jrkineman

ALT U.S. Tomahawk missile strike on Shajareh Tayyebeh Elementary School, Minab, Iran — February 28, 2026, 10:45am, one hour into Operation Epic Fury. Killed 156 people: 120 children (54 girls, 66 boys), 26 teachers, 4 parents. Amnesty International investigation found the U.S. relied on outdated intelligence — the school had been physically separated from the adjacent IRGC compound since 2016, visible in satellite imagery. When asked, Trump claimed “Iran or somebody else” was responsible. The U.S. has not accepted full accountability. Amnesty and HRW: investigate as a war crime.