Elon Musk, the world's richest man and a close ally of President Donald Trump, has faced widespread accusations of making a Nazi gesture twice during a speech to a crowd of Trump supporters gathered at Washington's Capital One Arena for an indoor "Presidential Parade" on Monday, shortly after Trump's second inauguration.

Musk clapped his right hand onto his heart and then thrusted his arm straight outward at an angle with his palm facing down.

Musk's response to the accusations has included the complaint that the "legacy media" is trying to cancel him.