SAINT PAUL, Minn., Nov. 3 /PRNewswire-USNewswire/ -- Formation of the largest nurses' union and professional association in U.S. history took another major step forward Monday with a unanimous endorsement of the affiliation agreement vote by delegates representing 80 percent of the members of the United American Nurses (UAN). Even as a number of state affiliates inexplicably failed to attend the meeting, the national delegate assembly of the UAN moved forward to create the 150,000 member RN "Super Union."