. >> there was a private platform that was built underneath the waldorf-astoria hotel, which is one ofe nicest hotels in new york and is built directly above the train tracks. and the platform was used for presidents. franklin roosevelt himself, who was not able to walk, got off of his private train car in his wheelchair and go directly to a private elevator that would take him up and into his suite at the waldorf-astoria. >> roosevelt was president during world war ii. at the time, there was concern that grand central could be the target of sabotage. >> there's one area of the terminal which is very, very deep below the ground, where power was converted, electrical power was converted, for use by the trains, and it was such a sensitive area that it's very heavily protected. there was fear, at one point, that spies would be able to get in there, and one handful of sand thrown into any of that machinery would shut the entire railroad system down and cripple the city. so it was very, very carefully protected, and even to this day, the public is not allowed to go down there. >> don't worr