Hundreds of nurses from all 50 states have applied to work in Minnesota as part of Allina Health’s plan to keep its Twin Cities hospitals open if its regular nurses carry out a threat to go on strike this Sunday. As many as 4,800 unionized nurses plan to strike for seven days, starting Sunday at 7 a.m., but Allina officials said they need to recruit just 1,400 replacements to get through the week.