MWS, PAN of vast lettuce field in Salinas Valley, "America’s salad bowl", mobile harvesting and packaging machines are in operation, Mexican workers walk behind units cutting produce and handing it to women on machine who wrap them in plastic and then pass in on to men who pack them in boxes. MLS, PAN of three harvesting machines in operation in field. HACS of lettuce, TILT UP to MLS of harvesting machine.