some how i dont think they are there for just show and tell.  Most people are cowards who simply follow power. However they want to rationalize it, they are essentially just following who they perceive to be the strongest leader. Because our MSM is so corrupt, they equate the most corrupt leaders as the strongest leaders for the country. Instead, the leaders the MSM props up are simply the best leaders for their own globalist and corporate interests. They are not leaders in service of the United States, they are leaders in service of being re-elected so they can maintain control and the illusion of state sponsorship. So these tanks, throughout history they symbolize power. And because the MSM has also been trying to disassociate "America" from its historical role as one of the leaders in terms of individual freedoms, and dismantle the iconography of a strong America - these tanks are more useful as symbols than on any contemporary battlefield.