This information was from the www.unions.org webpage. To find a detailed list of unions please visit the United States Department of Labor Find It! Audience- Labor Unions webpage.
National Labor Relations Board (NLRB): The NLRB works to protect employees' rights to organize and to determine whether to have union representation. The agency also tries to prevent and change unfair labor practices committed by private sector employers and unions.
The National Labor Relations Board is an independent federal agency vested with the power to safeguard employees' rights to organize and to determine whether to have unions as their bargaining representative.
Below are examples of unions that were in the news lately. The information presented is only for the purpose of showing how unions and union related events are in the news.
Local unions are typically are members of a state association. The state association is typically an affiliate of the national association.
The Example with the Chicago Teachers Union:
Chicago Teachers Strike Update, in the September 10, 2012 online Chicago Tribune
Chicago Teachers Union is a member of the Illinois Education Association which is and affiliate of the National Education Association.
Press Release on Why The Chicago Teachers And School Personnel Have Called A Strike
National Football League Players Association (NFLPA) was in the news with the 2011 NLF Lockout.
Article in Forbes titled Who Won the NFL Lockout? By Patrick Rishe