Tunnels in the north have most strategical importance to counter China's aggression.
https://pkbnews.in/challenge-the-dragon-with-the-longest-rail-tunnel-india-will-give-a-befitting-reply-to-every-blizzard/
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https://pkbnews.in/challenge-the-dragon-with-the-longest-rail-tunnel-india-will-give-a-befitting-reply-to-every-blizzard/
Challenge the dragon with the longest rail tunnel, India will give a befitting reply to every blizzard
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