'The U.S. U-2, first built in the 1950s, was an airplane; the German U-1, first built in the 1910s, was one of these'
a submarine
TRANSPORTATION: The U.S. U-2, first built in the 1950s, was an airplane; the German U-1, first built in the 1910s, was one of these
The U.S. U-2, first built in the 1950s, was an airplane; the German U-1, first built in the 1910s, was one of these
The U.S. U-2, first built in the 1950s, was an airplane; the German U-1, first built in the 1910s, was one of these
TRANSPORTATION
a submarine
TRANSPORTATION