Iowa building collapse leaves three missing despite prior warnings.

A structural engineer’s report issued last week indicated a wall of a century-old apartment building in Iowa was at imminent risk of crumbling, yet neither the owner nor city officials warned residents of the danger days before the building partially collapsed, leaving three people missing and feared dead. City officials said on Thursday that they did not order an evacuation because they relied on the engineer’s assurances that the building remained safe. The state’s search and rescue team, search dogs and cameras were used on Thursday to continue combing the building for missing people.