Those with an interest in railway preservation likely know that Britain has perhaps the largest number of preserved lines and locomotives in proportion to the size of its overall network. How could the US and Ireland, both nations with a large number of railways, have a preservation network to match Britain's? My first thought in the case of the US would be a railfan president being elected in 1948 or 1952 (Eisenhower becomes a railfan in his youth, decides to run in '48?). Our railfan pres is somehow able to push legislation through requiring all Class I railroads to preserve about 5% of their steam fleet. Costs for their upkeep would be split between the government (perhaps a National Railroad Museum with branches in various states) and the railroads.