FYI on the firetrucks. Anon wanted to know.

How Are Local Fire Trucks Numbered?

… Each community was given an unique set of numbers for their stations.

“They try to give it a series," says Riley. "Like, [Fairbon is] one through nine. The city of Xenia is 30 through 39. So their Fire Chief is chief 30. And their stations are 31 and 32. Bellbrook is 20 through 29. Sugar Creek is…”

…Clay also says fire Stations in Maryland are numbered in three digits by how close they are to Washington D.C., for example. It’s whatever numbering system works best for local firefighters in a particular area.

http://wyso.org/post/how-are-local-fire-trucks-numbered-wyso-curious-investigates

>it looks like the Q74 is something special

>United States Airforce - Even though the Joint Base is in MD, the firetrucks are Base trucks.