Beyond the rail yard incident itself, we had a whole new element to deal with this morning. As of five a.m., Homeland Security had raised the terror threat level for Washington’s mass transit system from orange to red. All subway service, bus routes, and commuter trains were suspended until further notice.

This was only the second time any sector had gone red since they established the alert system after 9/11. There was no soft-selling it to the locals anymore.

Reports were steadily coming in that people were starting to flee the city in noticeable numbers.

The story had gone fully national, too. CNN was up on several screens around the room, covering the shootings and transit shutdown to the exclusion of everything else. They had a live helicopter shot of the rail yard, crawling with TV crews.

You could see officers from the Explosive Ordnance Division in their bulky suits, climbing in and out of the subway cars, like something right out of The Hurt Locker. It was the kind of imagery news directors love, and law enforcement hates.

I took my seat next to Javier Crist, an MPD sergeant who worked at LX1 full-time. He had the computer-assisted 911 dispatch up on one of the screens in front of him, monitoring the distress and emergency calls that were pouring in from everywhere. Our job was to gather information from the field, report it to the room, and send back a constant stream of leads for MPD to run down.

“Welcome to Camp Hell” was all Crist got out before he had to take another call.

That was the extent of my orientation. My own phone was already ringing.

I slapped on a headset and got straight to work. This wasn’t what I had been hoping for, but at least it was something. I was on the inside now.

BREE CROSS WAS reading in bed at two o’clock that afternoon when the doorbell started ringing. Not just once, but over and over and over.

Something was wrong.

And if it wasn’t, someone was going to get a piece of her mind once she got to the front door.

She jumped up and dropped her book on the bed. The title was You and Your Stepkids. She was supposed to be getting some sleep before the night shift, but this was a chance to sneak in a few chapters while no one was looking, especially Alex, who would be sweet enough about the book but would be unable to stop at least one snorting laugh.

“I’m coming!” Bree yelled from the stairs. The bell was still going. She could see two shadows on the other side of the front door’s frosted glass, one of them a good head taller than the other. Now what?

When she flipped the dead bolt and threw open the door, Nana was standing there. Next to her was a man Bree had never seen before. The man had his arm around Nana’s middle, and she was holding a red-stained handkerchief up to her forehead. Her left knee was dripping with blood as well.