Michael Doran joins the PBS NewsHour to discuss new evidence that suggests Saudi Arabia’s crown prince orchestrated the killing of Jamal Khashoggi, and how the U.S. will respond to its longtime ally.

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The P4 laboratory, on the campus of the Wuhan Institute of Virology, in Wuhan, in China's central Hubei province. (Hector Retamal/AFP via Getty Images)