In an act that could be charitably described as a breach of decorum—or seen as an unforgivable slight to those who perished in Friday’s terror attacks, President Obama arrived late to the conference room for Monday’s session.

A video posted to Youtube shows the seat beside Turkish President Recep Tayyip Erdogan, reserved for the American president, was empty as Erdogan called the group to observe a moment of silence.

In the video, the placard to the right of the Turkish leader was clearly labeled “United States” in front of a very empty chair. German Chancellor Angela Merkel was shown looking over her shoulder, as if to see where the missing Obama might be.