U.S. Marines with Marine Medium Tiltrotor Squadron (VMM-163) fly over Lake Tahoe during Mountain Training Exercise MTNEX 6-15 out of Mountain West .
US Marine MV-22 Osprey Helicopter hover Flight Demonstration.
United States Marine Corps MV-22 Osprey tiltrotor aircraft, assigned to the 31st Marine Expeditionary Unit, take off from the flight deck of the forward deployed .
