** FILE ** In this Dec. 18, 2012, file photo, a truck driver watches as a freight container, right, is lowered onto a tractor trailer by a container crane at the Port of Boston in Boston. The crane and a reach stacker, left, are operated by longshoremen at the port. (AP Photo/Steven Senne, File)

Photo by: Steven Senne

** FILE ** In this Dec. 18, 2012, file photo, a truck driver watches as a freight container, right, is lowered onto a tractor trailer by a container crane at the Port of Boston in Boston. The crane and a reach stacker, left, are operated by longshoremen at the port. (AP Photo/Steven Senne, File)