A newspaper photograph shows a Manitowoc Shipbuilding Company guard stopping cars of shipyard workers on snow-covered South Sixteenth Street near the main shipyard entrance to check for identification. At the right are several workers coming in on foot. This picture was taken on Monday, March 3, 1941, the first day for new security procedures that were imposed when the firm secured a contract to build submarines for the U.S. Navy. The shipyard area was closed to the public and was patrolled night and day by a special staff of some sixty guards. Visitors having business on the grounds were issued temporary passes at the guard office and surrendered the permits when they left. Even local policemen were supposed to obtain passes. Inset in the upper left corner is an example of the button identification badge that all company employees were required to display as part of the new security measures. This photograph was published in the Manitowoc Herald-Times on March 5, 1941.