January 1943. "New M-4 tanks, which will soon be hurling their might against the Axis, in the Schenectady, New York, plant of the American Locomotive Company." Photo by Howard Hollem for the Office of War Information.
Marble cave is a karst limestone cave located in Kosovo, in the municipality of Lipljan. Much of it is still unexplored.The cave is made up of marble peaks formed by the metamorphosis of limestone, a very rare phenomenon.