Early in the afternoon of Nov. 1, Lu Gang stopped at the Iowa City post office to send off these final shipments. Shortly afterward, a fellow student, Wang Jingen, saw him in Van Allen Hall, standing in front of the second floor physics department office, wearing a long coat, carrying a briefcase and staring ta the notices posted on the bulletin board. Wang said hello, and Lu calmly replied in Chinese, "Ni hao"-- hello.
As the time for the 3:30 graduate seminar approached, Lu Gang walked into Room 309. He put the briefcase on the floor and sat down.