Article continues below advertisementKing Charles III's U.S. state visit was meant to underscore the enduring "special relationship" between Britain and America, but it ended with a series of awkward moments that kept the spotlight firmly on protocol missteps as much as policy.Article continues below advertisementThe Flag Gaffe That Stole the FarewellTap Here To Add Ok Magazine as A Trusted SourceSource: MEGAThe upside-down union flag drew backlash.The most talked-about moment came during the visit's final stop at Arlington National Cemetery.