Video footage shows the moment Donald Trump made the outlandish gesture shortly after touching down in Shanksville, Pennsylvania, as Melania follows behind him.
Trump was visiting the site where United Flight 93 crashed, 17 years after the September 11 attacks, which saw almost 3,000 people lose their lives.
And he greeted crowds with a double fist pump – sparking a huge backlash online.
But it is Melania’s reaction that people noticed most.
“She wants to disappear into the ground”
In eye-opening footage, she can be seen walking behind the US President with her head bowed.
And social media users think it is proof she does not agree with the actions of her husband.
“She wants to disappear into the ground – what an absolute moron she must think Trump is,” one Twitter user claimed.
Another added: “She can’t…