 It's normally not an especially big deal when various groups are invited to Washington to mark some special or ceremonial occasion. When an NFL team wins the Super Bowl, for instance, they get to go to the White House, shake hands with the president. Everyone goes about their day. The same is true when scientists are invited to celebrate their Nobel Prizes or soldiers are honored for winning the Medal of Honor or families are invited to participate in the annual Easter egg hunt. In cases like these, usually there's no big scandal that erupts after the fact. People show up, they participate, whatever the event is, they leave.