A Soldier from Company D, 2nd Battalion, 12th Cavalry Regiment, attached to 2nd Brigade Combat Team, 1st Infantry Division, communicates with his squad leader while pulling security during Operation Beastmaster.BAGHDAD — Staring down at an empty lot, Spc. Craig McBaine wondered how such a tranquil neighborhood could be the scene of so much carnage. Nicknamed “IED Alley East,” this 700-meter stretch of barren earth has been the scene of many attacks against coalition and Iraqi security forces. On this day, the patch of land, bordered on three sides by once-beautiful three-story houses, is occupied by up-armored Humvees, Bradley Fighting Vehicles...