The Pentagon's hypersonics "war room" is closely tracking how the COVID-19 pandemic is affecting the supply chain, especially smaller companies that make key components supporting the technology, according to a senior defense official. "We're monitoring it very carefully and we're concerned about the first-tier industrial providers, but we're also worried right down the supply chain," Mark Lewis, director of defense research and engineering for modernization, said during a Mitchell Institute event Wednesday. "If you look in hypersonics, for example, some...