Failed politician and Benghazi hoaxer Hillary Clinton snubbed Melania Trump during George H.W. Bush's funeral when she refused to shake her hand or wave at the First Lady. This wasn't an accident - the other former presidents and their wives were happy to exchange greetings with Melania, but Hillary is too salty & self-absorbed to engage in polite and common social rituals.
Melania shook hands with former Barack, Michelle, and even Slick Willy (Bill was more than happy to say hi to Melania). Even the Carters were happy to see Melania. But Hillary was too proud and arrogant for such pleasantries.
In case you're wondering, yes, the world noticed.