বার্লিন টানেল: মার্কিন গোয়েন্দা সংস্থা CIA সমাজতান্ত্রিক রাষ্ট্র পূর্ব জার্মানিতে গোয়েন্দা তৎপরতা বৃদ্ধির জন্য জার্মানির পশ্চিম বার্লিন থেকে আধা কিলোমিটার সুরঙ্গ টানেল নির্মাণ করে পূর্ব জার্মানির দুর্ভেদ্য গোয়েন্দা নেটওয়ার্কে সংযোগ স্থাপন করে।
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আমাদের অল-ইন-ওয়ান মোবাইল অ্যাপের মাধ্যমে সীমাহীন শেখার সুযোগ উপভোগ করুন।
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