seeing co-vid patients. and it's just -- they were tied into their mechanical systems. that's just an additional strain. so we're trying to assess how we can reduce the strain on their facilities and their mechanical spaces and oxygen distribution as well. will. >> reporter: the army corps also serving white memorial in boyle heights where they have 180 co-vid patients and the head of the er celebrating the arrival of the army corps of engineers. >> that's right. these folks can't get enough oxygen into their bodies. that's what makes it hard. the patients need so much oxygen, and there are so many patients, and so the two taken together, it's taxing the system. these oxygen lines can only carry so many liters per minute, and we're approaching the upper