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Professor Wayne Yokoyama, MD, long intrigued by the function of natural killer (NK) cells, has shown that NK cells, using a “licensing strategy,” are vitally important elements of the immune system.

Environmental engineer Lilia Abron, PhD, founder of PEER Consultants (www.peercpc.com/) and PEER Africa, approaches physical environments as human environments, helping others build not only houses but sustainable communities.

For Arsalan Iftikhar, AB ’99, JD ’03, the catastrophe on Sept. 11, 2001, changed everything. After sending a condemnatory statement to major U.S. newspapers, he became a much-sought-after analyst.

When Aaron Plewke, MArch ’11, was applying to graduate programs in architecture, he wanted to be seen not just for his abilities as an architect, but also as a leader full of integrity, who was committed to community service.

Students playing games with and listening to the stories of abuelitos (the local word for elderly adults) in Chile might not be the first image that comes to mind when thinking about a summer experience. But that’s exactly what students with the International Service-Learning Program in Chile did during their break.

Women’s basketball coach Nancy Fahey has been ­selected a member of the Women’s Basketball Hall of Fame Class of 2012.

Carol B. Loeb has devoted her life and career to education and the advancement of students.

Bluena Khatri, MSW ’09, assists immigrants and refugees at the International Institute of St. Louis.