Deep down in the halls of Aperture, GLaDOS was preparing for the new batch of test subjects. She had a new idea, see how the quick minded and impressionable children would be able to complete test chambers. Maybe they would be even better at it than adults. She knew young children were out of the question, but teenagers would be perfect. She looked into one of the relaxation vault rooms and chuckled softly. As she made the last few preparations and felt a flicker in her energy, she ran tests on the facility and everything seemed ok. GLaDOS knew she would have to be careful so she sped up the production of the test chambers. The mechanical arms worked quickly and in harmony. She ran another test on the facility, she noticed that her view of the deeper part of the facility was wavering ever so slightly; she decided to ignore it for now and keep on her work. One of the teens stirred slightly so she made them settle, they weren't going to wake just yet.