Any visible or mentioned location in the comic 24: Nightfall.
“Virginia was a state located in the United States of America. Langley, the location of the...Virginia
“Belgrade was the capital city of Serbia. It was the location of the University of Belgrade...Belgrade
“Serbia — a European country in the Balkans — was among the nations listed in the CTU Operations...Serbia
“Langley was an American city in the state of Virginia. As the Central Intelligence Agency's...Langley