Only once

Serena I watched as men in hazardous suites enter the school and started rounding up all the kids in my grade. The place tags one each of us and than we were Marchand into a the halls and into a waiting bus. There was two busses. One was mark XXX3457 And the other XXX0467 Iwas placed im the second and my best friend Andrea was placed in the first. I watch as they drove off, and minutes later so was ours. We drove for what seemed like hours before finally we stopped at a big building that seemed eery. It was literally in the middle of nowhere, no trees, no buildings, no nothing. Just this building alone. I looked around to see if there was any sign of the other bus but unfortunately not. We were once again ruffled into a line and leaded of the bus and into the huge building. As we entered our tags were removed and a woman, maybe only 40-45 came in and place a steel bracelet on each of us, before we were ordered to enter into empty rooms, one in each. Inside we were told to strip naked and move out into to room behind the inside door. I can't imagine what was happening, and wjere are our parents? Why aren't they here, saving us. I removed my clothes, but as I was about the romove my underwear I was stopped by a man, who abruptly entered the room. He turned around and placed his fingers to his lips and hushed me. He handed me a towel and came closer. "I need you to walk out that door in 15 seconds and take this table the moment you see the guards..." I looked at him puzzled. "Just do as you are told and I promise ypu won't die here today.." Die? Why were we going to die? I was now scared... What was happening?