Inside the Baltimore shipyard that produced hundreds of WWII vessels at incredible speed

In 1941, the United States Maritime Commission ordered the establishment of emergency shipyards to build cargo ships for the U.S. and Britain that could be assembled as cheaply and rapidly as possible to replace losses from German torpedoes.

The Bethlehem-Fairfield Shipyard on Baltimore Harbor was established in February and quickly set 27,000 employees to work building these new "Liberty ships."

Each Liberty ship was designed to carry over 10,000 tons of cargo, but often carried far more to meet wartime needs.

The construction process was streamlined to the point where in some cases an entire vessel could be welded together and ready to launch in less than a month.

On Sept. 27, 1941, the first Liberty ship, SS Patrick Henry, was launched from Bethlehem-Fairfield in a ceremony led by President Roosevelt.

Over the next four years, the shipyard churned out 384 Liberty ships, plus 94 larger and faster Victory ships and 45 amphibious landing ships.