It's the little things about her husband that drift into Mary Garza's mind now and then. Even on the busiest of days, when he worked from before dawn until well after dusk, he would make time for her, have lunch with her. "My husband was a devoted soldier," she said. "He always told me that he had to make sure that his men came back safely. And they did. He was the only one who was killed." As a 43-year-old first sergeant in the Third Infantry Division, Joe Garza had between 300 and 400 people under his command, his wife...