We were finally close enough to see what the problem was. On the other side of the door, each kid and agent had to carefully climb over the pipes and cement that had been shaken free from the tunnel’s ceiling.

My blood was beating hard inside of my head, but my limbs felt hollow with panic as we waited, and waited, and waited for it to be our turn. Liam was bouncing on the balls of his feet, like he was gearing up to bolt forward at any moment.

Once we were at the door, I stopped and stepped aside to let the others go in front of me, but Liam was having none of it. He all but lifted me up and over the debris, then climbed over himself, his body the wall that kept me from turning back.

I heard Vida curse behind me and Chubs’s labored grunt. The tunnel felt hot and humid with so many bodies crammed into it. The blasts from above had collapsed sections of it, slowing our progress again and turning what had been a simple path into an obstacle course.

I felt the thundering vibrations before the sound of the crashes actually reached my ears. It was a series of four low bangs, each louder and worse than the next. Vida shouted something up to us I couldn’t hear over the vicious wave of noise that followed. My stomach, my heart, everything inside of me seemed to drop, like the tunnel had given out under me. The seconds passed at half their speed, giving me just enough time to turn away from the explosion that blew out through the door we’d just come through.

We threw ourselves to the ground as a blast of gray dust and chunks of cement and glass came shooting out of the doorway. The tunnel shook so hard, I was convinced it would cave in. The kids, the agents, everyone was shouting now, but I heard Cole’s voice amplified over everyone’s: “Move, move, move!”

But I couldn’t. I was only able to push myself up onto my knees, drag myself up using the wall. I could hear Vida and Chubs talking, complaining about the dark, how they couldn’t see each other.

“That was HQ,” I whispered. “Did it collapse?”

“I think so,” Liam said.

“The tunnel back in is totally blocked off now,” Chubs called up, coughing. The kids in front of us passed the news up through the line of people ahead of them. We heard the shock and tear-stained responses all the way from the back of the herd.

Those agents…the kids…their bodies that we had to leave behind, whose families would never know what happened to them, who didn’t get a chance to escape, who might have still been clinging to life when—

The sob stuck in my throat, and I couldn’t cough it free. I wasn’t crying, but my body was shaking violently, hard enough that Liam wrapped his arms around me from behind. I felt his heart racing against my back, his face as he buried it against my neck.

He was solid and here; all of us, alive. Alive, alive, alive. We had made it out. But still, I couldn’t stop seeing it, the way the ceiling must have caved, the falling glass, the floor that suddenly wasn’t there, the darkness sweeping down.

Focus, I commanded myself. There are still kids behind you. You’re still not out of this. Don’t let it take you, too. Liam, Chubs, Vida, and Jude. Liam, Chubs, Vida, and Jude.

“Just breathe, just breathe,” Liam said, his own voice shaking.

The steady pattern of it, the rise and fall of his chest beside me, was steadying enough that my grip on his side relaxed. He pressed his lips against my forehead, more out of relief than anything else, I thought.

“We’re okay,” I said. “We’re okay. Just keep going.”

My mind caught the words and carried them forward in the dark. Just keep going. The longer we walked, the harder it became to tell the difference between my fear, my anger, and my guilt. They were a swollen mass in my chest, a rising sore. Someone ahead of us was either laughing or sobbing; the noise was so unhinged, I couldn’t tell the difference.

The biggest fear, the one that kept my heart firmly lodged at the base of my throat and my knees sliding forward, forward, forward as the cement gripped at my shoulders, was knowing that, at any point, the whole thing could come down on top of us.

Breathe.

It should have been comforting to feel Liam pressing close behind me. We finally reached a section of the tunnel that was whole and where we could stand at our full height. It felt better to be moving that way, like it was a sign we were almost through. But it was still so impossibly dark. No matter how many times I tried to look back, I couldn’t see anything past the vague shape of Liam’s face.

Keep going—Head down, arms in, only going forward, forward, forward as fast as I could move my feet. I lost track of time. Five minutes passed, ten minutes, maybe. Fifteen. The mildew smell changed to an all-out rancid stink as the drains constricted again. I kept my hands out on either side of me, letting them glide along the slick, dripping cement. Liam let out a strangled grunt as he cracked his head against the sloping ceiling, and a second later, I had to duck.

The standing water was thick and reeked of rotting things and mold. I heard someone start to retch, and it was like it always was—once one person started, everyone else’s stomach was heaving, too.

I clawed blindly at my face, trying to clear the hair that stuck in clumps to my cheeks and neck. It snuck up on me, the suffocating—the thick, sticky air seemed to vanish, the tunnels constricted, and I couldn’t see a thing, not one damn thing.

We are not going to die down here. We were not just going to disappear.

I tried to stay focused on the rhythmic, slow shuffle of skin against concrete and the way the water seemed to recede with the ceilings. How was it possible that the tunnel felt so different heading out than it had coming in? I felt it widen again, dipping down; it might have been my eyes adjusting to the dark, but I could have sworn it was getting lighter.

I wasn’t imagining it. The change had been gradual at first, a hint of a glow, but it was bright enough now that I could see Liam’s surprised face as it turned down to meet mine. The tunnel filled with sounds of relief. I stood on my toes, trying to see over the heads in front of me. The smallest pinprick of light was staring us down the long tunnel, and it grew just that tiny bit larger with each step. A sudden burst of energy kicked my legs up, moving them faster, and faster, and faster until I could see the ladder, the figures climbing up out of the crippling dark and into the light.

For a long time, there was nothing beyond the smoke.

It hung around us in a curtain of graying brown, warmed only by the setting sun. The debris that had been blasted in the bombing still hadn’t settled. It floated down through the open door, a fine, crushed cement that swirled as we stirred it. My arms shook the entire climb up the ladder. Cole was waiting for us at the entrance to the tunnel, gripping my arm and hauling me out before turning back to get Liam.