Search underway for six presumed dead in bridge collapse

Investigators all day were aboard the ship responsible for the catastrophic bridge collapse in Baltimore, interviewing crew and doing inspections as the families of six bridge workers hold out hope remains will be recovered. Transportation Secretary Pete Buttigieg joins to discuss. As well, the head of the Army Corps of Engineers joins to discuss the enormous effort to clear all that mangled metal and reopen this major east coast shipping port. Also, CNN's John King on how Arizona voters feel about Biden or Trump as the November election creeps closer. 

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