Hospital: 1 dead and 16 critical after tornadoes

Onlookers standing at the Sgt. Floyd Monument in Sioux City, Iowa, watch as a storm cell passes over the city Monday, June 16, 2014. (AP Photo/The Sioux City Journal, Tim Hynds)

Onlookers standing at the Sgt. Floyd Monument in Sioux City, Iowa, watch as a storm cell passes over the city Monday, June 16, 2014. (AP Photo/The Sioux City Journal, Tim Hynds)

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