Daniel Pipes

About the author: Daniel Pipes is the director of the Middle East Forum, a think tank that works to define and promote American interests in the Middle East. He is the author of numerous books and articles on the region.

The September 11, 2001, terrorist attacks against the World Trade Center towers and the Pentagon were the latest in a long series of actions that comprise militant Islam's war against the United States. Previous attacks include 1983 bombings against the U.S. embassy and marine barracks in Lebanon, bombings of embassies in Africa, and killings of Americans in New York and other places. Future attacks by militant Islamists may be even worse, involving weapons of mass destruction.

All four of the plane crashes on September 11 occurred in...