George Stephanopoulos checks in with ABC correspondents after shots were fired at the White House Correspondents' Dinner; With the ceasefire indefinitely extended and the status of negotiations to end the Iran war unclear, George Stephanopoulos speaks to the lead U.S. negotiator for the 2015 Iran nuclear deal, Wendy Sherman, and veteran diplomat Richard Haass; the roundtable discusses the effective safety protocols that were in place at the Correspondents' Dinner and political violence.

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