Castle

I think the 21st century should bring back castles. Think about it, if you had a huge ass castle with super thick walls and cannons and such, no one would think about attacking a "White Castle" the same way they would the White House (mmm, little burgers, white castle). You could always try to comb a castle as well as the White House (even with hardcore security system of not flying overhead... but that could be bypassed). But imaging having someone fly into a castle like they did the twin towers... we'd laugh it off and call him an idiot... cuz no one fuks with a castle... especially a fantastically modern one.