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Congress is set to hear from former U.S. Capitol security officials for the first time about the massive law enforcement failures on Jan. 6, the day a violent mob laid siege to the building and interrupted the presidential electoral count.

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The N95 respirator masks that health care workers need to protect themselves while treating coronavirus patients are in dangerously short supply. So much so that physicians are wearing used respirators, risking infection to care for patients. But now, Duke University researchers have developed a method to clean them so they can be safely re-worn.