I saw this on a really amazing website called Shorpy. This is the Chesapeake & Ohio M-1 steam turbine locomotive in 1949. These engines were coal-fired turbines that produced 6,000 horsepower! They were complete failures, unless you measure success in terms of awesomeness. They were built in 1947 by Baldwin Locomotive Works, and because they were massively complex and expensive, were retired by 1950. What a beast!