[Labor Day 2004 - 1] Steve Mellon, Post-Gazette Teresa Heinz Kerry, second from left, wife of Democratic presidential candidate Sen. John F. Kerry, walks down Grant Street with labor and government leaders during the Pittsburgh Labor Day parade yesterday. From left are Jack Shea, president of the Allegheny County Labor Council; Heinz Kerry; Sylvia C. Wilson, vice president of the Allegheny County Labor Council; Gov. Ed Rendell; Allegheny County Chief Executive Dan Onorato. [Labor Day 2004 - 2] Steve Mellon, Post-Gazette Throngs of union members walk past the reviewing stand on the Boulevard of the Allies during Pittsburgh's annual Labor Day parade yesterday.