Oops! France orders wrong size trains

(FILES) -- A file picture taken on April 29, 2014 shows the new SNCF Regiolis Regional Express Train (TER) during its presentation at the Vaugirard railway station in Paris. The arrival in France of new and larger regional trains, the Regiolis TER constructed by Alstom and the Regio 2N constructed by Bombardier, will require construction work to to reconfigure station platforms, at a cost of over 50 million euros, as the trains are too wide for many regional platforms. AFP PHOTO / FRANCOIS GUILLOTFRANCOIS GUILLOT/AFP/Getty Images

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    Oops! France orders wrong size trains

After ordering $20B worth of trains, France realized many of their platforms are too small. CNN's Jim Boulden explains.