Iran issues threat after Trump announces Strait of Hormuz 'humanitarian gesture' and more top headlines

Iran has issued a threat after President Trump announced a 'humanitarian gesture' related to the Strait of Hormuz, while other news includes a mass shooting at a lake party and a suspected rodent-borne virus outbreak on a cruise ship. Former New York City Mayor Rudy Giuliani was hospitalized. Multiple US service members are missing in Morocco after a multinational exercise.