Secretary of State Marco Rubio is pressing Russia for answers over a suspected plague case, saying the Trump administration still has only "quite limited" information about what happened to "Patient Zero." A 28-year-old employee at a Russian anti-plague research institute died after developing a mysterious case of pneumonia, prompting quarantines and heightened health precautions. @​GillianHTurner reports the World Health Organization is urging experts to focus on the case as questions mount over Russia's transparency and what threat, if any, it could pose to Americans. ▻