Why is the eagle on the White House twitter page upside down?

The eagle on the background of the Twitter page is upside-down because the picture was taken from behind it looking upwards at the ceiling (the eagle is on the ceiling in the White House).

If the photographer was standing in front of the Eagle, it would be the right way up.

It's just the angle that the photograph was taken, it is not an error.

Some rather uneducated people are saying it's an omen or bad sign. It's not. It's just, as stated above, the angle the photograph was taken in the room.