New Center Associates: Chorev, Hacohen, Lebel, Lerman and Mekel BESA Center August 25, 2016 Maj. Gen. (res.) Gershon Hacohen, Brig. Gen. (res.) Moni Chorev, Col. (res.) Dr. Eran Lerman, Ambassador Arye Mekel, and Prof. Udi Lebel have joined the Begin-Sadat Center for Strategic Studies as research associates, over the past year.