From the Annals of Petty Shit:

The White House on Saturday published a photograph of First Lady Melania Trump flanked by Queen Mathilde of Belgium and other spouses of NATO leaders at the Royal Castle of Laeken in Brussels—and conspicuously left out the name of the the First Gentleman of Luxembourg. Gauthier Destenay, an architect, married Prime Minister Xavier Bettel two years ago, making Bettel the first European Union head of government to marry a same-sex partner. Photographs of Destenay chatting and shopping with other NATO spouses went viral after the Thursday meeting.

The source was Facebook so I had a look and found that they’ve updated it to include Destenay, but why not do that in the first place? Because petty shit.