Three adventurous veterans train alongside some of the world's most elite military units, getting an inside look at their tactics and weaponry.
Vietsub - HDHoàn Tất(09/09) Điểm ngoặt: Bom nguyên tử và Chiến tranh LạnhTurning Point: The Bomb and the Cold War
Vietsub - HDHoàn Tất(03/03) Khám Phá Rạn San Hô Great Barrier cùng David AttenboroughGreat Barrier Reef with David Attenborough