Rocket mystery: What weapon was Russia testing in Arctic?

Five Russian nuclear engineers who died in a rocket engine explosion have been buried in Sarov, a closed town 373km (232 miles) east of...

The Russian state nuclear agency, Rosatom, said the experts had been testing a nuclear-powered engine. But it gave no further technical details.

The test was on an offshore platform in the Arctic, at a naval test range.

Russia has previously tested a nuclear-powered cruise missile, “Burevestnik”.

But officials did…