5 things: Steelworkers on Northwestern NLRB ruling ... Symphony postpones trip ... More bids for Citizens Bank? ... Marte signs with Pirates .... EQT, Horsehead shares down (Video)

Here are five things to know in Pittsburgh business for Thursday, March 27: Steelworkers back college athlete unionization The United Steelworkers called the National Labor Relations Board ruling allowing Northwestern University football players to form a union "a tremendous victory...