Rules are changing at Minneapolis’s 911 center after a WCCO Investigation found some callers waiting minutes to get through. Raymond Callihan’s wife tried twice to reach an operator last week when her husband suffered a heart attack. Her second call took more than two minutes to answer. Callihan died Thursday morning. City leaders Thursday expressed sympathy for his family. But operators at the 911 center worry others may not get help as quickly as they should, and they’re asking for more staff.