UPDATE 1 — Putin says Russia is building non — negotiable 'security zone' in Ukraine along border
(Adds Putin quotes in paragraphs 3-4) MOSCOW, Oct 16 (Reuters) — Russia is establishing a "security zone" inside Ukraine along their border, which will be non-negotiable in any future talks with Kyiv, President Vladimir Putin said on Friday. Putin, wearing military uniform and speaking during a visit to a command post,