> Experience developing the SR-71 led Kelly Johnson to believe that the U.S. needed even larger, 250,000-ton presses, and in the 1980s the Army studied whether presses of up to 200,000 tons might be useful. But no such presses were ever built, either in the U.S. or elsewhere.
I imagine extremely large construction and digging. Kilometer-tall buildings and deep large tunnels.
I imagine extremely large construction and digging. Kilometer-tall buildings and deep large tunnels.