Elon Musk, the world's richest man, standing behind a podium bearing the Seal of the President of the United States, on Monday twice gave what scholars, journalists and rights groups said was a Hitlergruß,

They projected the words “heil” and “boycott” alongside the large Tesla logo, as if to read “heil Tesla” or “boycott Tesla" on to the nine meter high building on Wednesday night

The British campaign group "Led By Donkeys" has claimed responsibility for the stunt that authorities say may have breached German laws on the use of symbols linked to illegal organizations.