Her heart thudded. Her skin itched. Her hands clenched. She passed a small kitchen, and the smell of coffee and pastries filled the air, but people were silent, heads down, grab and go. The next row of meeting rooms was empty. She was running out of space and time. Head bowed, she walked to the far end of the room and saw an escape stair, waved the ID tag at the lock, and stepped through. It was dark and cool inside, the stairs nothing more than a cast concrete tube with emergency lighting and cheap handrails. She stood at the edge and looked down.