Pakistani marine special force corps (L) introduces a kind of bullet-proof vest to Chinese marine special force corps during the multinational Naval Peace Exercise "Aman 09" in Pakistan, March 7, 2009. The multinational Naval Peace Exercise "Aman 09" began on Friday in Pakistan's southern port city of Karachi. The navies from 12 countries took part in the exercise with their battleships, maritime aircraft and other forces. [Xinhua]