Justine Sacco, the head of corporate communications for Barry Diller's InterActive Corporation, lost her job after tweeting "Going to Africa. Hope I don't get AIDS. Just kidding. I'm white!"
She sent her tweet Friday before she boarded a flight from New York to Cape Town, South Africa, unaware that during her 11-hour flight her tweet went viral.
When she got off the plane she was greeted by reporters and photographers demanding answers.
Daniel Post Senning, an etiquette expert with the Emily Post Institute, joins Here & Now to discuss proper Twitter etiquette and how to avoid social media faux pas.
This segment aired on December 23, 2013.