Apple is closing its Towson, Maryland store, the first US location where retail employees unionized; the union says it is "outraged" and exploring legal options (Joe Rossignol/MacRumors)

Joe Rossignol / MacRumors: Apple is closing its Towson, Maryland store, the first US location where retail employees unionized; the union says it is “outraged” and exploring legal options — Apple today announced it will be permanently closing three retail stores in the U.S. in June, including…