3/4/2011 - After arriving at Hanscom AFB March 3, Gen. Ann Dunwoody, commander of the Army Materiel Command, stands with Col. Stacy Yike, 66th Air Base Group and Hanscom base commander, and Brig. Gen. Harry Greene, senior commander of the U.S. Army Natick (Mass.) Soldier Systems Center. General Dunwoody is the first female four-star general in U.S. history. (U.S. Air Force photo by Mark Wyatt)