INCOMING ROUNDS WHISTLE AND SNAP AS U.S. MARINES ARE UNDER ATTACK (CNN GRAPHIC BATTLE VIDEO)

A unit of U.S. Marines come under heavy attack in this VIDEO. CNN's Nick Robertson narrates what happened as incoming rounds whistle and snap around the Marines.

Two U.S. Marines are hit during the course of the firefight.

WATCH THE VIDEO HERE:

http://www.youtube.com/v/yNtAkq_usVY&hl=en&fs=1

CLICK ON ARROW TO PLAY THIS DRAMATIC VIDEO