Until yesterday, I was unaware that the District’s firefighters work eight 24-hour shifts a month, and that 40 percent of them live over 30 miles away from the city. These may seem like disconnected little factoids, but they’re playing into what could well be a nasty battle between firefighters and the District over how much they should work.

It’s tough to measure how much being the chancellor of the District’s public school system is actually worth, but Kaya Henderson’s current salary seems to offer a hint: $275,000 a year, plus a $12,500 signing bonus.