How do you write a dateline?

Datelines are used when the information for a story is found outside the hometown of the paper or source the reporter is writing for. They are at the very beginning of the story and have the city written in ALL CAPS and can be followed by the state written in a normal format (first letter capitilized only). Some major cities do not even need to be followed by the state. There are thirty of these special cities according to the Associated Press Stylebook.

• DENVER - The Brighton Ski Resort...
• WAXAHACHIE, Texas - School administrators met yesterday...

http://owl.english.purdue.edu/owl/resource/735/02/
Molly Oretsky, Sports Writer