Thursday morning, the Marine Corps will bury one of its own. Retired Maj. Gen. Fred Haynes wasn’t just any Marine, though. As a captain, he served as an operations officer for Combat Team 28, participating in the bloody Battle of Iwo Jima that resulted in nearly 7,000 U.S. combat deaths. In 1967, he served as the top operations officer of Marine forces in Vietnam. Haynes died in March, and will be buried at Arlington National Cemetery following a service at Arlington’s Fort Myer Old Post Chapel. The delay in his burial is likely the result of the time and resources…