With no connection to Wednesday's terror outage, a mass-catastrophe drill will be held Thursday at Jerusalem's Teddy Stadium - the end of a trauma course for sixth-year students at the Hebrew University-Hadassah Medical School. Sounds of explosions will be heard in the area. The students will play the roles of wounded, doctors, supervisors and spokesmen. The final drill will begin at 10 a.m. in the stadium's parking lot under the direction of Prof. Avi Rivkind, director of general surgery and the trauma unit at Hadassah University Medical Center in Ein Kerem. The Israel Police, Magen David Adom, Zaka and Home Front are also set to participate, and for the first time, an Israel Air Force helicopter will land there.