sentences:  Katherine reaches Nathan, knowing about his involvement in the StarkCorp project from the files she stole.Katherine shows Nathan the files she stole, and he reveals that he calculated the nanomachines for what was supposed to be a way to cut down pollution on Earth.Nathan, and Katherine realize that the nanomachines were taken to the oil rig after the government pulled the plug on the project, and they were released into the atmosphere during the accident, creating the storm.