Remembering those who perished one year ago at the WTC - Profiles of Johns Hopkins University alumni who died in the 9/11 attacks

Thomas Cahill worked as a bond broker at Cantor Fitzgerald in the World Trade Center. While at Hopkins, Cahill majored in economics. He was a member of Tau Epsilon Phi Fraternity , along with his older brother, Jim Cahill, '85, and also played varsity tennis. Approximately 800 relatives and friends attended a memorial service in his honor 11 days after his death. He is survived by four siblings and his parents. Cahill was 36 years old.

Matthew O'Mahony worked as a bond trader for Cantor Fitzgerald in the World Trade Center. Along with his good friend Glen Wall, O'Mahony majored in political economy and played varsity basketball while at Hopkins. He was also a member of the Newman Club, a Catholic student group. Matthew is survived by his wife, Lauren, to whom he had been married for just over a year. O'Mahony was 39 years old.

Glen J. Wall worked as a bond trader for Cantor Fitzgerald in the World Trade Center. Along with his good friend Matthew O'Mahony, Wall majored in political economy and played guard on the varsity basketball team while at Hopkins. He also was a member of the varsity Lacrosse team. Glen is survived by his wife, Diane, and their two daughters Payton, 4, and Avery, 3. Wall was 38 years old.

John Sammartino earned his master's degree in electrical engineering at Johns Hopkins in 1990. He worked as an engineer at XonTech Inc., a research and development firm involved in defense issues. He was on board American Airlines Flight 77 when it left Dulles Airport and was later hijacked and flown into the Pentagon. He is survived by his wife, Debbie Rooney, and his 4-year-old daughter, Nicole. He was 37 years old.

Paul Friedman worked for Emergence Consulting of Lincoln, Massachusetts. He was aboard American Airlines Flight 11, on route from Boston to Los Angeles when it hit the World Trade Center. At Hopkins Friedman majored in psychology and was a member of the JHU Barnstormers, a student-theater group. He is survived by his wife of 10 years, Audrey Ades, and his newly adopted baby son from Korea, Richard. Friedman was 45 years old.

David Nelson was a senior vice-president for Carr Futures, a global institutional brokerage firm with offices on the 92nd floor of the World Trade Center's north tower. At Hopkins, Nelson majored in behavioral sciences. His sister Meryl, who is pregnant with her first child, has decided to name the child after her brother. Nelson is survived by his wife, Elizabeth and his two children: Frederick, 4, and Ingrid, 8. He was 50 years old.

-Compiled by Ishai Mooreville