evidence: URZUF, Ukraine — From his watch post overlooking the sandy beaches of the Azov Sea, Nemets is charged with guarding the shoreline against a possible Russian incursion. [...] Nemets, who prefers to go only by his nom de guerre, comes from the central Ukrainian city of Kirovohrad and is a member of the all-volunteer Azov Battalion, one of Ukraine’s many paramilitary groups formed in response to the government’s struggle against pro-Russian separatists in the country’s east, the territory where a Malaysia Airlines jet was shot down on July 17.