Another Arkansan is among the latest casualities of the war in Iraq. Twenty-one-year-old TJ Parker of Heber Springs was among four US Marines killed yesterday in an ambush in Ramadi, 60 miles west of Bagdad. Parker served with a sniper platoon of the First Marine Division out of Camp Pendleton, California. He and three other Marines were killed by insurgents and videotaped lying dead in what appeared to be a walled compound in Ramadi. Parker is survived by his wife, Carla, and one-year-old daughter, Laura. Family pastor Reverend John Bishop says Parker`s family is clinging to his letters for comfort.