NEW YORK -- Nippon Steel's pursuit of U.S. Steel is entering the final stages, underscoring how an American industry protected by tariffs fell behind in technological innovation and is now paying the consequences.
Decades of deferred investment have led to technological stagnation

Nippon Steel has pledged to invest billions of dollars in U.S. Steel and bring in new production technology. (Source photos obtained by Nikkei)
NEW YORK -- Nippon Steel's pursuit of U.S. Steel is entering the final stages, underscoring how an American industry protected by tariffs fell behind in technological innovation and is now paying the consequences.