Answer:
They made money off of them and they didn't have to do work
Explanation:
Al-Qaeda's main targets on September 11, 2001 were the two World Trade Center towers in New York City and the Pentagon in Arlington. A fourth flight (United Airlines Flight 93) crashed in Pennsylvania after passengers stormed the hijacked cockpit. It is believed that this flight was intended to crash into the White House in Washington, DC.
I think it is the last one
When Diocletian realized that the empire was too big to run, he split the empire into four regions. This helped to restore order in the empire and also to reform it. His reign stabilized the empire and marked the end of the Crisis of the Third Century