Sheerness, England — At the mouth of the River Thames, just downstream of London, an elite team of marine salvors is working to stabilize one of the world’s most dangerous shipwrecks.
The SS Richard Montgomery, a United States military cargo vessel, grounded on a sandbar, fractured its hull, filled with water, and sank in late summer 1944 — just months after D‑Day — leaving roughly 1,500 tons of explosives aboard.