Russia lost a dozen elite marines when they cooked food on an open fire and triggered an explosion from nearby live ammunition. Eight more were wounded in the incident that Vladimir Putin's regime has sought to cover-up. Reports say a RPG-7 grenade launcher shell caught fire and exploded at Kuzminsky military training ground in Rostov region, bordering Ukraine. Eight of the marines from 155th Separate Guards Marine Brigade, based in Vladivostok, were killed on the spot. Four more died in hospital, said the News 166 outlet in Rostov, which said the humiliating tragedy had been confirmed by three independent sources....