Combustion Integrated Rack (CIR) Manifold Bottle Replacement: The crew removed a 50% ethylene fuel bottle and replaced it with a 100% ethylene bottle. They also installed a 100% helium bottle. This is in support of the ongoing BRE (Burning Rate Emulator) experiment, which is part of the ACME (Advanced Combustion via Microgravity Experiments) suite of …