Glossary
Center: An air traffic control center. Example: Cleveland Center, Indianapolis Center

Ground Zero: the site of the attacks, where the World Trade Center towers stood

World Trade Center: although two buildings were the focal point of the attacks,

State Department


Abbreviations
EST: Eastern standard time

WTC: World Trade Center

CIA: Central Intelligence Agency

FBI: Federal Bureau of Investigation

FAA: Federal Aviation Administration

DOT: Department of Transportation