By the time the codes were changed in 1968, though, more than fifty years had passed since young women, with no other way out, had gone to the windows of a building two miles from the trade center site to escape the Triangle Shirtwaist fire. At the start of the twenty-first century, young men and women in the prime of their days were, once again, leaping from windows to escape the heat of a tall building. The hijackers—and history—had left them no other way out.
