January 31, 2016 6:20 pm Countdown to Iowa Caucuses Iowa voters are getting ready for the caucuses. News4’s Aaaron Gilchrist reports from Des Moines. Local 3:36 DC officer shot near police station in Northwest, rushes inside for help 2:38 Cargo ship that destroyed Key Bridge pulled back to Port of Baltimore 1:07 Cargo ship that crashed into Baltimore bridge moving back to port 0:43 See It: Cargo ship that brought down Key Bridge towed back to port 3:21 Crews working to refloat Dali cargo ship