Explosive Ordnance Disposal Technician Chief Petty Officer (Expeditionary Warfare Specialist/Freefall Parachutist/Diver) Nicholas H. Null, 30, of Washington, West Virginia, died August 6, 2011, in Wardak province, Afghanistan, of wounds suffered when his CH-47 Chinook helicopter crashed. Chief Petty Officer Null was assigned to an East Coast-based Naval Special Warfare unit.