Union representatives and safety consultants say the case of the man charged with attempting to assassinate President Donald Trump at a media dinner is the latest example of someone allegedly trying to use the country's passenger trains to smuggle guns for an attack. They say it won't be the last until ground transportation companies address security and passenger screening. Rail passenger advocates argue that TSA-style checkpoints are impractical at stations. Authorities allege Cole Tomas Allen was arrested with weapons he brought with him to Washington via Amtrak from California. A lawyer representing Allen notes he has no criminal record and is presumed innocent.