Beneath the graceful curve of the St. Louis Gateway Arch lies the empty shell of an underground visitors' center, partially completed when electricians' from the A.F.L.-C.I.O. local early this month walked off the job, stopping all work. Their complaint: the contractor had hired plumbers from the rival Congress of Industrial Unions, a labor organization formed by St. Louis Negroes, who cannot get into the lily-white building locals.
The walkout prompted the Labor Department last week to request federal action against" the A.F.L.-C.I.O. Building Trades Council under the 1964 Civil Rights Act, marking the first time that this law has...