American billionaire Elon Musk joked online about assassination attempts on President Joe Biden and Vice President Kamala Harris, prompting an investigation by the US Secret Service, citing Bloomberg. Following an alleged assassination attempt on US presidential candidate Donald Trump, Musk posted on his social media platform X, saying, “And no one is even trying to assassinate Biden/Kamala.” He later deleted the post after facing backlash online. Musk explained that it was intended as a joke. However, the US Secret Service has initiated an investigation to determine whether Musk poses a threa…