evidence: Navy Special Warfare Operator Chief Petty Officer (SEAL) Matthew D Mason, 37, of Kansas City MO (wife from Omaha NE) was assigned to an East Coast-based Naval Special Warfare unit. He was killed 8/6/2011 of wounds suffered when his CH-47 Chinook helicopter crashed in Wardak province Afghanistan. [...] Navy Master at Arms Petty Officer 1st Class (Expeditionary Warfare Specialist) John Douangdara, 26, of S Sioux City NE was assigned to an East Coast-based Naval Special Warfare unit. He was killed 8/6/2011 of wounds suffered when his CH-47 Chinook helicopter crashed in Wardak province Afghanistan. [...] Petty Officer 1st Class (SEAL) Caleb A Nelson, 26, of Omaha NE was assigned to an East Coast-based Naval Special Warfare unit, Norfolk VA. He died 10/1/2011 after his vehicle struck an improvised explosive device while conducting a combat patrol in Zabul province Afghanistan.