Team USA just played one hell of a match against Ghana in the World Cup. So Delta Airlines paid homage to these wonderful athletes with a Statue of Liberty and a giraffe.
Obviously Lady Liberty represents America, but Delta just walked into that prickly zone of reducing Africa, a continent of more than a billion people, to simply animals. If you've taken a civics class in the last 15 years, you might be familiar with a similar situation where AT&T touted international calling to Africa with a monkey on the phone. (There were actual humans for the other continent.)
UPDATE: Delta removed the tweet around 9:30 p.m.
UPDATE 2: Everyone on Twitter seems to be enjoying this, especially the part about Ghana not having giraffes: