>>> flags are flying at half-staff to honor a new york city police detective killed in afghanistan. joseph lemm is one of six service members who died yesterday. margaret brennan is at the pentagon as we learn more about the victims. margaret, good morning. >> reporter: good morning. it has been a brutal christmas week for the families of those we spoke to the brother of one of the victims, who called his sister a true leader. air force major adrianna vorderbruggen was the highest ranking officer killed in monday's attack. >> she's a hero. i hope she's a hero to all of us, not just to me. >> reporter: older brother christopher said his trail blazing center was charged with protecting the largest u.s. military base in afghanistan. >> she intentionally would go on these patrols with her men, because she wanted to show them that she would do what she was